I'd like to share my opinion on this topic. I choose definetely both of them cause there are a lot of pros and cons whether in PS (such as nice soft, quite tempting winning prospects and fish filled boards) or in 888 rooms (which are smaller, conier and without such a hurry). As for negative sides, winning a freeroll PS tournament is like becoming a World Cup champ due to huge amounts of players. The play in 888 rooms very often turns into push and all-in bets which distracts your attantion from real game. So, take it or leave it I suggest u all playing on both resourses.
Sincerely yours, mrpolyglott
from Russia with love!