The Caretta is truly a dream tandem. It is one of the fastest, most stable boats on the market today, with a very large capacity. We have paddled it in all kinds of water and found it to be amazingly easy to manuveur or to just make good time. At 80+ pounds, it is amazingly light for a tandem.
On one trip, my wife had to bail before we hit the water so I paddled it solo. I put most of the gear in the front cockpit to balance the load and was amazed at the speed I could maintain and when the wind was below 5 knts, I didn't even need to use the rudder. Speaking of the rudder, the smart track rudder system is truly outstanding.
If you are looking for a great double, the Caretta is as good as you can get.