So, today, I went and got some ankle and wrist supports from the dollar store, figured I'd try it out, seeing that they were only a dollar! They made a big difference, especially for landing. The ankle supports helped for landing, so my ankles weren't all loose, until I've gotten them strengthened enough. The wrists supports helped for climbing on concrete walls, to avoid scraping, granted, I'm not going to wear them all the time, in case I happen to need to move through my enviroment, but for a dedicated training session, it helps a lot,and I highly recommend it!!

Dollar store material is a dollar for a reason. If you really want to trust your body's stability on supports you got for a dollar then go ahead. To extrapolate on what Jesse said, if you need supports, you're not ready. Simple experiment. Try taking your shoes off and see what kind of stuff you can do. I think you'll be surprised at how little there is your body can handle.

I personally find that tape works out for the best when you need that little extra support. Braces and supports are more the designed to be used as a preventative to motions that will hurt your joints, like a wrist brace prevents damaging movements of the wrist during a fall. They are best used after an injury while something is healing, not to strengthen above a normal state.