I don't own a viper but own a darton mustang-1994 they were made in the early to mid 90's. My friend owns the viper probably a 1993-1994 model. he still uses it till this day he sees no reason to buy a new bow. i just got back into bow hunting in 2006 and used my mustang but decided to get a new one for 2007. i bought a ross 337 great bow but I realized that once I put fiber optic sights, new peep,rest and newarrows for the mustangI wondered why i bought my ross. Then again i am still wondering why i purchased an excalibur phoenix crossbow 4 months ago even though you can't hunt with them in NYS.