UltimateBet's 111%1st-time deposit bonus up to $1200

[vowels]

Hi, is UltimateBet a site I can trust my entire bankroll on? I saw their 111% 1st-time deposit bonus up to $1200 advertised in Poker Pro magazine. $1200 is about the size of my entire bankroll, so it would seem perfect for me, but then I see Ultimate Bet isn't even listed on bonuswhores.com, and I wonder if there's a reason. I planned on playing mostly $5.50 NL Holdem STT's over there, in case that has any bearing.

Thanks for any help.