Altitude select ok, except when you reach an altitude and then want to climb or descend on autopilot, this is impossible...unless I'm missing something.  Frequency selection still a problem.  Can dial in the first part but not the ".__" frequencies, e.g. 116.__, 110.__, etc.  ADF/HF also a headache.  Thus, no navigation capability, and would preclude any type of approach.  Communication (other than HF) can be taken care of with the ~ key.