I am lazy and inexperienced so at first I tried to get RTF kits. You just glue the wings, charge the battery and fly. Doh! I did this until I discovered that most RTF kits are rubbish. Most of them give you brush motors or low quality radio systems. So I realized that most factories use rubbish equipment for the RTF kits.

Then I turned to ARF kits, where I faced other issues, especially with the instructions. They were scarce, even non-existent for some building procedures. Also it used to be a very big problem for me deciding what to buy (prop/motor/esc/battery).

I think that you get what you pay for. Planes I've bought from chinese online shops tend to require a lot more work than the ones I've bought from local hobby shops. You save money, but have to spend more time making 'fixes'.