Can somebody volunteer their opinions regarding trying to check-raise vs leading the flop (about 100-120 with two others in the pot, I'd say).

Also, does the 1/4 pot bet from UTG+1 mean he has a drawing hand and is hoping to see some cards cheap, or a good hand that he's trying to slow play while still building the pot? Or, does it just mean that he hit the bet button without any thought about bet size? I tend to think it means nothing, but am curious about others' opinions.