Dolphin Nautilus CC Automatic Robotic Pool Vacuum Cleaner Includes Ultra-Fine Filters for an Ultimate Clean, Ideal for In-Ground Pools up to 33 FT in Length

I love the Dolphin, which I named Willy. He works for several hours almost everyday and collects an unbelievable amount of grit, sane, debris, and foliage. My pool is the best it has ever looked. Why I waited this long, I have no idea. I will say that I upgraded to the Nano-filters which was a super-smart choice. The water is so much cleaner and clearer and I can't believe how much gunk and fine particles are in the nano-filter which clean easily with the squirt of the hose. I can't say enough good about Willy.

Great pool vacuum! Easy set up from the box into your pool. Vacuum picks up everything, from fine sand to leaves & debris that can be on the bottom of your pool. I highly recommend buying this. I am a former Polaris owner and will never go back. Set it and forget it - your pool will be clean!

I have a 16x32 above ground vinyl lined pool. I purchased this vacuum for a couple reasons:1) I wanted to get something that saved me hand brushing my liner day in and day out.2) I wanted something that was reasonably affordable compared to the premium models, and seemed good enough for my above ground pool.Here are my observations after a couple months of use:1) Super Easy startup... Drop unit in water, plug into power box, turn on.2) No programmable time settings. Runs for a couple hours and stops. Have to start again if pool is still dirty.3) The smart path navigation it uses to map the pool is random. Some reviewers say it seems to get smarter after each use. I have not observed this, at least with this model. It picks a different path every time you turn on. Some paths are smarter or more efficient than others.4) It climbs walls successfully in the forward direction. But seems random sometimes when it decides to climb. So not all of your pool walls will get scrubbed in a single vacuum.5) Rotating scrubber or agitator works well. Just realize that this agitation, along with water propulsion from the unit itself will stir up some debris and put it in suspension. This may or may not resettle by the time the vacuum cycle finishes.6) By default this model comes with a fine filter, and I purchased this package with the extra ultra fine filter. This is probably where I was most disappointed. The fine filter does reasonable at picking up most debris, but very fine particles will pass through and resettle post vacuuum. The ultra fine filter will pick these finer particles up, but seems to cause the unit to have much lower suction and as such leaves most of the larger, heavier debris behind. After calling tech support, it seems this is expected behavior, where each filter medium has a specific purpose, but are not multi-taskers. I knew going into the purchase the fine filter would not catch everything, but I was hoping the ultra fine would serve 2 purposes and it does not. I even tried mixing, using 2 fine and 2 ultra fine cartridges, but the ultra fine reduces suction and the fine lets particles pass, so kind of worst of both worlds. Note: The filter box requires you to unscrew it all if your want to replace all 4 filter cartridges, which is a bit cumbersome. So my primary use model is using the fine filters only, and I have a hand battery vac I use to get the really fine stuff. I imagine the more premium models solve this with 2 independent filter mediums working together.7) Even though this model does not have a power cord swivel, no issues with tangle as long as power line is put in the pool relatively tangle free.8) Filter box easy to clean. Just make you have a powerful spray function so medium does not clog up over time.Overall, it does mostly what I had hoped it would do, and has saved me a bunch of time in terms of manual weekly maintenance.

This thing is a game changer. Cleans perfectly, easy to deploy and remove. Easy to clean. The fine filters clean the “dust” well. Not having to fool with batteries is also a plus.

Works great and I love the super fine filter that comes with it

Replaced my Proteus DX4. It may be “cheaper” but it’s more reliable. And even though it doesn’t advertise that it can clean the upper wall, it totally can. Impressed. Only downside is that it’s a smaller basket, but I typically cleaned it out when there was just a small amount of debris anyway

Do NOT buy!!! If give negative stars if I could....The cleaner worked very well- for 4 months. Then the power supply just crapped out. I contacted Maytronics and they emailed me to say it's under " warranty" and a replacement will be coming- that was two months ago. I still have no operating cleaner and no answers. Nobody has updated me or reached out to me. When I call or go on their "chat " service it's literally 30-40 minutes before someone engages. They just tell me " it's ordered".... "you're InThe Que".. they are selling these items on Amazon on their own page so they clearly have them! What good is a warranty if the company won't stand behind it??? And further why would the thing just stop working after 4 months? My pool looks like crap as I have no other way to clean it and our swim season will be ending soon- so I haven't had a pool cleaner for almost 90% of our pool season ( could be 100%- only time will tell if and when I actually get the replacement). It's a shame- I had an older version of the same robot for 10+ years and it worked GREAT!!! Do NOT buy!!!!!

The vacuum itself does a fine job of removing the debris from our large pool. My complaint is with the controller. When it sits in the sun, it swells up. I have tried throwing a towel over it, but it still swells and it feels weird when you depress the buttons, sometimes having to press them multiple times. As the blue cord needs to be at the edge of the pool, I cannot back the controller into the shade (the cord would not allow the robot to reach the entire pool). We are in Georgia and it is a hot sun. I am surprised and disappointed that this was not accounted for in the design. I am quite sure that the life of this robot will be affected by the wear on the controller. When the robot is done running, I remove the controller and bring it inside to minimize the sun damage, so it is not baking outdoors all day everyday. Would not buy this unit again, even though it does a good job cleaning.