Take the harness that comes with the climber you buy and toss it. Go buy the hunter's safety vest as many others have said. Summit stands are a good choice for beginners, but practice with all your gear many times before going out. You need to get comfortable judging the diameter of the tree (hunting height vs ground) vs cable length settings....as you climb the stand levels out based on the pitch you set it up while on the ground. If you set the stand level from the get go, you will have a negative pitch to your platform and will feel like you are falling out of the tree.

How fit you are should factor in your choice of stands. Not very fit, then get a sit and climb stand, fit, then go for a open face hand climber...summit open shot is a good choice but requires more muscle power to climb.

Always wear your harness while climbing and while in the tree.....be safe and good luck.