For the most comfortable a hang on...my vote is also for the millenium. I've hunted all day numerous times out of mine, don't end up even a tad bit tired or sore. GREAT stand.

Can't comment on the most comfortable climber....I know alot of them are very comfortable. I have an old API Predator, its incredibly comfortable too. Don't use it much anymore, but an all day sit is no issue when needed.