I use a Viper myself and like itmore than the other half dozen or so climbers I've had. The best advice I can give anybody is to use a full body harness at all times with it. Dead or crippled hunters don't use climbing stands very well. Take your time climbing up and down; making noise to get up a tree quickly is not good hunting.

The only other thing I'd say is that I had to grind down and rounded the teeth of the foot portion about 1/8" because it bit too deply into some of the Tulip and Poplar trees I climb. First time I used it I had a hard time just getting it loose to come down.