I had the older ES-1 in a Taylor 341ce. It was okay but nothing to write home about. That is, good enough for live, but I would never try to use it on a recording unless it was just strumming. However, a few months ago I played an 814ce with the newer ES-2 and put it through a Fishman Loudbox. Sounded fantastic. However, I'd really have to take it home and record with it to make a final judgement because I'm sure some of what I was hearing was the actual guitar sitting on my knee, but if it sounds as good recorded as what I heard in the store, I would be very happy with that indeed.
Bill