I am a new owner of a Kodiac 450 purchased in order to have a 2nd atv for my daughter to ride/grandson to learn on. After much research and consideration I purchased the 450. The complaints about the power deficit are unfounded. The quad does it all well. Not a fire breather but the girl gets it done in 4× / low. Will pull my Polar trailer loaded well past 1322 lbs. Oh by the way the Grizzly is also rated at 1322. However the 450 is so smooth and refined that I will always use it to get the mourning paper and the mail/ run the DOG!! All the while with coffee/beer in the left hand. The Yamaha so impressed me that I sold the reliable and hard working Polaris. A worthy tool but so very crude. Just picked up the new Kodiac 700 in the desert camo look. Wow... love the 450 however the 700is a different level. Don't regret the 450 purchase for the reasons above... but for 800$ more for the basic rides the choice of the 700 is a no brainers. If you a contemplating a Kodiac all males will want the 700. What a machine. Will update after some seat time. The vibration I have heard about is noticeable... appears to be the heat shroud on the muffler. I'm just an old dude who likes quality products that perform better than expected. RED KED.