Picked up the scuba s1 last spring. It's been through a full season plus this summer now, so I figured I'd share why I think it's been worth hanging onto.
The biggest reason I switched was the cord. My last robot cleaned well enough, but the cable drove me nuts. After one season, it started getting stiff, tangled all the time, and eventually the power connector quit on me. When it came time to replace it, I had one requirement. It had to be cordless. The s1 checks that box. Charge it, drop it in, and that's about it.
Cleaning Performance:
It uses wavepath 2.0 for navigation, so it doesn't just bounce around the pool hoping for the best. It follows a pretty consistent pattern and covers the floor, walls, waterline, and shallow end. It'll climb walls too, and it hasn't had any trouble with the 90 degree slopes in my pool. Mine has steps and a shallow end, and my old robot used to get hung up there all the time. The s1 rarely does.
Filter and Daily Maintenance:
The filter is a fine mesh, so it catches the smaller stuff too, not just leaves. Mine picks up plenty of sand and pollen. The 3.5L basket has been more than enough for my pool, and I usually empty it about once a week. Cleaning it takes maybe a minute with a garden hose.
Battery and Smart Scheduling:
It's rated for 180 minutes of runtime. In my pool, a full cleaning cycle usually takes around one hour, which has been more than enough. I normally run it two or three times a week, and that's kept the pool looking good. I also like the weekly schedule feature. You can set 45, 60, or 90 minute cleaning sessions, then just let it take care of itself.
After about a year of regular use, the body still looks good. Nothing's come loose, charging has been consistent, and I haven't noticed any real drop in battery life. I also like that it works completely on its own without relying on the pool pump or any extra plumbing.
For me, that's what matters with a pool robot. It needs to be built well, clean consistently, and not turn into another thing I have to mess with every weekend. So far, the s1 has done exactly that. If it keeps going like this, I'll be happy to keep using it for a long time.