ATL for this fairly new model. Large water tanks and single side edge cleaning. Gimmicky "deep clean" of your water (electrolysis for a short period, see some bubbles but I really don't see what it would actually do, I use the reclaimed "distilled" water from my condenser dryer in it now anyway so no impurities for it to bubble)
I have one, works quite well. However, one downside that I overlooked when choosing is it doesn't come with any spare rollers or filters and they dont seem to be readily available (none of the other brands seem to be compatible, rollers at least. Maybe more luck with the filters). I think it's still a decent buy at this price.
Is this good for stubborn tiles? We have a domestic cleaning business and currently outsource balconies for example