I just did a flight from one airport to another, and the altitude call outs worked as normal. Not sure why they didn't when I did circuits at the same airport.

There was some strange autopilot behaviour when I changed the flight plan to go direct to a waypoint during the descent though. Firstly, the aircraft started climbing again, then went into a 20% nose down dive. After disconnecting the AP, and reconnecting it, it was fine. I will try again though in case it was a one off, or in case I had done something wrong.

I guess starting from cold and dark if necessary, is easy enough if you're doing it regularly to remember exactly how to do it for that aircraft.

As long as the aircraft works ok, I will fly it every so often as it is something different. It seems to need a much higher nose up attitude than the another company modern 737s, and you really have to turn the yoke a lot for the aicraft to turn. Hopefully that is an accurate simulation of the 733.