I play both. The only times I miss being able to overbet the pot are preflop, usually when raising from the blinds, and on the river with a big hand. It doesn't play too different really, he should be fine.

I like pot limit though, I find games to be a touch looser on the all the big sites, and the PLHE on Pokerroom is insane. I don't seem to find quite so many multicampers playing pot limit, it's full of players who love to see flops and just one more card.