I am currently learning on a Tiger 2, i have never flown a trainer. I am learning with an instructor with a buddy box. I know a lot of people view the 4* or Tiger 2 as perfectly acceptable trainers. They have excellent flight characteristics and are still capable of some pretty cool aerobatics. I dont know about the 4*(i only mean that i have never built one so i cant comment) but the Tiger 2 is a very sturdy plane(no, i have not crashed it) it is designed very well.