I have the Dolphin Premier and while it works great for me, I have very few large leaves. I most always use the pleated filters and it keeps my pool spotless. As far as I can tell it does not miss a spot. Of course, like all robots it does not do stairs or seats, at least not all the time.
The design of the unit does not allow for it to pick up a lot of big leaves as there is just no place for them to go.
The next robot I buy will be the newer design, with the top loading basket and no handle. Like, or similar to, the Active 30i.
I have the remote for the Premier , but have never found a reason to use it..