ES-339 is agreat ride
the ES-339 is a great semi-hollow. For those that want the mellow tones of a semi, but aren't fond of the size of most ES guitars, this is a great option.
I also own a CS-336, and the construction differences do make a difference. However, those differences do not justify the almost $1,000 price difference.
I am really a fan of the '59 rounded profile neck - very comfortable, and only available on the 339 (so far).
The guitar was set up well right out of the box. Plays like a dream. Overall, a great guitar