I'd be interested in such a place 3rd.
I tried to get some friends of mine together to rent a condo in Jaco, however none could make it (K*ds and wives). Anyway, the only thing I'd really like with this place you are thinking about is a pool since Chicas love being around a pool during the day it might be easy to get some over for who knows what (I know, have to be careful they don't steal the TV!).
I like Jaco a lot... nothing to do during the day is just my style when on vacation.

I think the heat is just a matter of mentally preparing for it, but this is just me.