it has its pros and cons ...i have one in my tank and when it went out i went weeks with just an maxi jet hanging in there, actually noticed more PE too
it is a lot of cash to drop on "power head" but its alot cleaner looking, only need one (i assume), more control over it ...so its a nice toy and it looks good but i think the same things can be accomplished with other power heads as far as a happy healthy tank
that being said i like mine alot if only for the fact it looks better in my tank ...i ended up buying two replacement (all my fault) wet-sides and a new controller this year alone