I thought I'd add to this review since we were on another moorings 4600 a few weeks ago and it was a bit different..
Apparently they made some changes after it was first released. Similiar to how the Leopard 38 Cat had some minor changes and was re-named the Leopard 39, these changes are about as minor.
Biggest change which annoyed me the most was the lack of steps from the helm down into the cockpit. You had to walk around to get to it. This also made it quite difficult to use the VHF radio while at the helm. Also didn't have the solar panels the newer models have. Not a big deal here either, but I did notice the batteries were drained more than they had been in the past.
There were a few other minor things we noticed, but nothing as major as this. It's still a great boat, but I'd rather charter a newer model (probably under 3-4 years old) - this boat was nearly 5 years old and leaving the program this summer.