I upgraded from a bagged suction vac to a Polaris iQ+ robot and have been pretty happy with it. I bought a second filter cartridge which was pretty pricey IMHO ($100). The biggest issues I run into are 1) it needs a 2nd cord swivel/anti-tangle at the control station as currently with a single swivel at the unit the cord tends to get tangled any way eventually. 2) occasionally the wifi signal drops/disconnects and needs to be re-established.
The main selling point for me was the ability to direct the robot to spot clean certain areas using the smartphone app as we have an irregular shaped pool and the deep end always ends up trapping dirt in 2 specific areas. (poor design possibly).
I'd love to build a new pool (funded by others) with PebbelTec and an in floor cleaning system.
Thanks & Gig 'Em