Cub
Great Planes Cub Specs:
-40 size, 70 OS 4-cycle eng.
-Built without significant modification

Hits:
-Easy to build, great instructions
-Excellent parts quality
-Durable design
-Has the "Barn Door" Ailerons
Misses:
-The landing gear are easily bendable wires

Flight / Experience:
-Flys more like a real airplane than most other RC models.  You can practice "Slip" and scale cross wind approaches.
-Like its full size partner, it has a bad tendency to "Tip stall" if you are foolish enough to make a habit of making slow flat turns.  You must keep the nose coming down on slow low turns.
-Very good 2nd airplane trainer.  After all, everyone in this hobby has to eventually have a Cub.
-Sometimes wish that I had built the "Clip" (shorter wing) version; but, then it would not have been a Cub.  The Clip Wing version is more aerobatic and wind resistant.  It flys more like a Citebria than a Cub.
-The OS 70 4-cycle is ideal for scale sound and also doing aerobatics.  I have had a ST-51 on it.  About the same power but not the scale sound I like.
- I built floats.  They're a  "kick".  All  new flying experience; cuts back on aerobatic experience; but the landings and take-offs are really fun to make up for it.
- Replaced the wire landing gear with Aluminum solid also when I get around to it.
      - My latest experiment is with "Flaperons".  The Cub noses down with flaps applied and has to be compensated manually or linked with up elevator.  By the way, with flaps up in an air-brake configuration, the cub flairs up / climbs? I quit using these.