This actually isnt a bad gacha. I might consider doing it. Its a lot better than this one was:

New Year's Step-Up (12/30/16 - 1/6/17): Three 11-roll steps, step 1 ($100): regular rates, step 2 ($50): 5* and 6* only (95%/5%), step 3 ($30): 5* and 6* only (90%/10%)

That one was bad but this one can get you really good stuff. I think ill have no need for gold ones after this one and hopefully ill also get some rainbow ones out of it. I dont think youll get higher chances getting 6 stars from a 11-roll...So ill try my luck.