I like mine......it's a blast. I thought that it would snap & spin a little better.....but from what I've been hearing the recomended CG is very conservative....and I'm going to start moving mine rearward a bit at a time. I have a Thunder Tiger Pro .46 on mine with an APC 12.25 x 3.75 prop and I'd say it has unlimited vertical......it will pull up out of a hover relatively easily. Once I got about a 40 foot take off roll (in grass) and jerked it straight up.......it went to about 400 feet with no problems until I backed off of it....

Mike