My Feedback

Firstly, I'm loving this.  As a more "senior" sim pilot I do like the older more basic aircraft.  Proper nav etc. rather than button pushing.

Lot's of comments re RPM, RPM drop etc., and other small issues.  For mine, these seem a little pedantic given the stated level of system depth for this aircraft....

Important issues (for me !) :

Altitude hold:

As noted by others, there is altitude "creep" up/down with ALT HOLD ON.  Also as noted, this seems dependent on whether ALT HOLD is selected via the AP panel or the FD switch.  Test flights have indicated to me that if you use the AP ALT HOLD switch first, then the function works perfectly for the rest of the flight, irrespective of which switch you subsequently use.

HSI  VOR NAV display :

A FROM/TO flag is really required on this display.  As Nav is primarily via NDB and VOR, I consider this flag to be essential. 
The RMI can be used as a pseudo From/To, but better it's on the HSI......

The other issues elsewhere noted don't have any impact on my (emphasis on "my") enjoyment of this classic.

chris from oz