I have had my diagnostic for 2 years plus (third season of use) It works very well, even when i had my diametrious(spelling?) earth spill the dolphin handled it and picked it all up.
so the bag definately can hold fine particles.
I have a grecian shaped pool on the deep end and while traversing the walls it can spend some time manuevering past the corner. But it does make it.
It only gets to the first step for cleaning but didn't really expect it to do much more than that.
I also have witnessed the random 90 degree spin to change it's cleaning path usually 2 to 3 times during a typical 6 hour cycle. The impeller will stop and the guy will kick into high speed and turn. Kind of neat ha!
I have the handle set to one notch from limit and both floats on the cord side.
Use it once or twice a week depending on condition of the pool.
So far very satisfied.
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