Okay, to start, I have heard nothing but good reviews about it, so I figured I'd try it. My biggest issue is the idea of squeezing myself into a wetsuit. I'm 6' tall, and over 300 lbs. My friend, who's buying it for me for my birthday is insisting that we do it, so it's not like I can back out. People have tried to assure me I'll be fine, but I'm still super nervous. Also, are you kneeling the whole time. I can hardly kneel on a padded surface, so I'm a little concerned about that too. Any help from pooh-sized people who have done it would be great.