1. Upwind ability - I have a wipi '01 16.4 (22 surface) and it's almost impossible to go upwind with
2. Speed & Jumps - The problem with bigger kites is they move so slowly it makes for difficult jumping
3. Stability/relaunchability - Although I almost never drop the kite, every once in a while it will happen. My biggest problem is having the kite fall to the side and out of the sky when it luffs. The very high ar of the x2 makes the relaunching seem very difficult.
4. OK, I couldn't do it three

Thanks for the help
Henrik