You guys clearly don't know Honda 6 speeds and there, aren't speaking from personal experience.
I'll put in my two cents...
I had an 07 Civic Si with a 6 speed and it was a good transmission when driven gently but any type of sprited driving resulted in gear synchronizers grinding in 2nd and 3rd gear. It's all over the Internet. Honda is suffering from 2nd and 3rd gear issues in practically EVERY model that has a 6 speed manual transmission. This is Accords, Civics, and S2000s.
Having said that, the transmission should function properly and last a long time if driven properly but at the end of the day, having experienced transmission issues first hand, I can't say that they make good transmissions. Of course perhaps by now they did iron out the problems but only time will tell as people put 60k+ on those transmissions and report back...
Proceed with caution. If he likes the car, go for it!