I bought a new PSE Vipper crossbow is it a good bow?
That is a question best asked before you purchased the crossbow. If you are capable of shooting a compound, I can't imagine that you would like shooting the best crossbow in the world, nearly as much.
Deer season is upon us, and most would expect that you should already know if it's a good crossbow. How accurately can you shoot it? If you don't know this already, it could be hazardous to take it into the woods without a whole lot of practice.