I have devised my own kind of demo program that I thought works very well and so would share with people. I research rackets I would like to try and find one in particular. I go on **** and find a used on for cheap. I 'demo' it for a while. If I like it, I will go back on **** and buy two more new ones. If I don't like it, I just get back and sell it for the same price as I bought it, and then look for another one. I have never lost much, if any, money doing this. It is like a free demo program, where if you like the racket you just keep it. This method just makes more sense to me. Anyone else do this or have similar examples?