What do you think of this call?

[Gemin]

I am in cutoff seat, limp with 6S, 4C with three other callers, including the BB. The blinds are 2 and 5 dollars.

Flop is 3S, 4H, 5S. BB, UTG, Mid all check to me, I bet 15 dollars. UTG calls, everyone else folds.

UTG was a very aggressive player, liked to gamble, but had tigtened up a bit (I doubled on him about 15 hands earlier).

The turn was the 4S, giving me three of a kind, with an open ended straight flush draw.

He bet 30, I raised to 100, he went all in for another 200, I called.

What does everyone think of this call?

In case you're wonder, he had J high flush, but I got quads on the river.

Everyone at the table said I made a good call, but he kept saying how it was awful play on my part.

What does everyone think?