Until recently, I had 4 wingers (2 Zingers and 2 GUs). I recently sold the GUs as part of my move to multiple bumper launchers. I kept the Zingers though - I prefer the Zingers without question. IMHO, the Zingers are a better built product. You do get something more for the money. In three years of almost daily use, I have not had to perform any maintenance other than replacing the rubbers a year ago and occasionally shooting some dry graphite spray into the pulleys, etc. The GUs, however, were a different story ? in one year of ownership, I had to replace the hinges on one and routinely had to tighten the many bolt connections. I was more than satisfied with the functionality of the GU though - it performs its job very well; but it requires more attention to keep it in top performing condition than the Zingers. Also, the release lever and basket eye-bolt on the GU is more cumbersome to use than the simple thumb-like protrusion on the Zinger release. I always cock/load these launchers without releasing the tension on the rubbers, so the ease of placing the Zinger's basket eye-bolt on the release was noticeably different than the GU process. All said, for the price, GU provides you with a very nice product; but if you go with Zinger, you do get a more solid and better built product. I?ll be the first one to admit though, I bought my Zingers before GU was on the market. If GU had been selling its products 3 years ago, I would have gone with the GU based on price alone. Nevertheless, my GU have come and gone, and I still have the Zingers ? I don?t regret paying the extra money now ? they are worth it in my opinion. Best of luck in making your decision.