I previously owned a Viper Classic (27lbs steel). It was extremely comfortable and I loved it, except for the 27 lbs. I now own the Summit 180 (Bass Pro Exclusive). It's aluminum and only weights 21lbs. It is just as comfortable as the summit viper, but you can sit facing the tree (rilfle season) or with your back to the tree (great during bow season). I love the option of facing the tree during rifle season as it make a very stead rest. I can sit dawn to dusk in the rut. The only difficulty is staying awake.