I bought a Summit Viper SS a few years ago and I love it! It's ok weight wise at around 20 lbs and has straps so that you can wear it in the woods like a back pack. It's super easy to set up to! Unhook the cables and wrap it around the tree and secrue it back to the stand, get in, attach harness to the tree and you are ready to go up!
I love mine. I need to replace my cables though so as soon as I can, I'll be doing that.
Well I tried climbing my boyfriends. That wasn't as bad after I started going. It only weighs about 20lbs so keeping that the max limit is my plan. He is already plotting to sell me his so he can get a new one. Haha