I got my ultra fine basket yesterday. I must have a newer model Active 10. The basket was an exact fit with no removal of parts required, even though the instructions showed it. My Active 10 already had a plastic grid/motor guard in place, so I did not install the one in the box.
so after the first cleaning, I will say success, my pool is relatively clean fortunately, though I get dust on the bottom that the mesh filter would circulate and I think it is too fine for the sand filter. This morning it was gone, the ultra fine did its job. When I cleaned the filter it was noticeable.
The robot still climbs the wall the first cycle, must be either air in it or the switch to tell it when it is going vertical is not set.
For the price of these I think there would be a lot of happier people if they included the filters, but then again I could see the ultra fine filter clogging if someone had a lot of leaves and causing issues to the bot.
Thanks