I've been using Summits for the last 6years,IMHO,they are,without a doubt,the best climbing stands out there.I saw the new design at the Harrisburg,PA. show.The Rapid-Climbers are a good improvement,but the newly designed "top section"(where you sit) is sweet.Now,check this out-My Viper broke a weld behind the seat where it comes to a "V",and I had it welded again.I figured it was my problem.Well,it broke the first I used it.So I called Summit and talked to Ken,and he told me that in April to call him back.Ken @ Summit wants my old Viper back so they can see what went wrong with the weld,and they are sending me a new style Viper top section with the Rapid-Climbers.Ken told me that if they feel it's a fault of thiers,they will replace at no charge,and if not,I'd just pay the difference.I have no problem with that.So,I'll let you guys know how it turns out...Bob