I don't think it is high at all. I generally climb 25-30 feet with my Summit. I primarily hunt public land and the deer know to look up about 15 feet around here. I have been busted many times at that height but gone unnoticed at 25+ feet.

As many have mentioned, you can start with the platform tilted towards the tree and it will gradually level out. My Summit is also very easy to adjust while climbing. You can adjust the seat while standing on the platform and it only takes about 15 seconds. For the platform I do something similiar to Jack Ryan only I lower the seat close to the platform and then sit down facing out. I then hook my feet around and under the platform tilting it to the tree. Then I can just reach down and adjust the cable. Basically the same thing but sitting instead of kneeling. Remember to keep the cord that attaches the platform to the seat in case you drop it. That thing saved me from huggin a tree down 20 feet one time. Always remember to wear a safety harness when doing this. It only takes a split second to fall.