I had an older API Grand Slam Extreme and it was extremely comfortable but no more so than my current stand, a Viper XLS. The API had just a tad bit more room it seemed but not much. I think the Viper is quicker and easier to set up. I would have to pick the Viper over the API since they went bankrupt and are reportedly being made over seas now.

One thing I forgot to mention. It can be hard to stay alert in either one of these stands on warm afternoons!