RE: ParkZone Super Decathlon Review
If you make the standard mods to the SD: high pitch prop, Venom motor, steerable tail wheel, 2" front wheels, then the SD becomes a fun little plane. Compared to its sister plane, the J3Cub, the SD is harder to fly for someone that is just transitioning from beginner planes, but is a lot more fun to fly for someone who is experienced at the intermediate level.
For a major upgrade, switch out the electronics, set it up with a TowerPro outrunner and a 3-cell 800mah LiPo. Add some additional downpitch to the motor, otherwise you will keep fighting it to keep it from trying to climb with the extra power. With these mods, it becomes a very nice plane to fly, yet is very resilient, making it much better than the balsa models mentioned by Ithibault.
I agree with Sinai that PZ should bring out a brushless version like they did with the J3Cub. Only wish that they had added a steerable tail wheel and larger front wheels to eliminate those infamous ground loops!