KK PF question

I mostly play limit poker, with maybe 5k hands total of NL, $25NL and $50NL. I'm in vegas for the weekend and trying the low limit NL games here and really enjoying it, but some of the pf stuff throws me off.

Wynn 1/3 NL. I sat down UTG, got my chips and posted my BB on the next hand. So I've been at the table for maybe a minute total. I have $300 in front of me.

UTG and CO appear to have stacks of my size or have me covered. MP has about $100 in front of him, SB has a bit less.

UTG folds, UTG+1 raises to $15, MP calls, CO calls, SB calls, I look down at KK in the big blind.

You guys know as much about the players at the table as I did at this moment. I raised $100, $115 total. Opinions please? Should I have raised less?