Well finally got the Tree Flex,I tried it on and quickly handed it to one of my climbers(I actually already test drove one prior for a couple of weeks).I think its a well thought out design and seems sturdy.My complaints first-I hate the bridge it hurky jerky and not smooth at all.Its also really short and slides over the clevis and kinda gets stuck,not much mobility with the bridge.The lanyard d rings move to much.But the thing I dont like the most is the legstraps seem to crush my groin and my climbers as well.I asked his opinion without ever giving mine and he said it was harsh on that area.Well its not all bad the backpad is awesome really smart design,I cannot say enough good things about the back pad.Honestly I wish every harness would go to a similiar design in the backpad.The srt attachments is good but kinda bulky and probably contributes to crowding problems decribed earlier.The gear loops seemed to be positioned in the right spots and the hand saw attachment ring is perfect.The Petzl well fit like a petzl,you know small.It was really crowded,it was unbearable(but hey im 200 pounds).The srt is really hard to attach to,but not as bulky.I wish they would have copied the treeflex on the back pad,kinda thin and rides higher.The the carittol attachments dont really hold them in place except for the larger size.I liked the bridge more than the tree flex though.Another negative is you have to buy their $140.00 setup for the croll attachment.The rings are really cool design and lots of gear loops.Also has a handsaw attachment thats in a good spot.The climber I gave this saddle to loves it and doesnt have one complaint-but hes 140 pounds.The Tree Motion Is my favorite but ive been wearing it for a year so Im kinda bias.I wish the backpad was smaller and padded like the Tree Flex.The caritools dont stay anchored very long either.The elastic that held the leg straps and the plastic adjusters ripped off really fast and is impossible to get more-well almost.Seems to be some excessive wear on the webbing but thats documented and I think theyll fix that(or at least thats what I heard).As far as Srt,I just clip my croll directly to the swivel on my bridge,no biggy.I love the bridge It has the greatast range of motion and really helps me from twisting my back.The extra lanyard d rings come in handy to.But that bridge is awesome,granted it took a little while to get use to.I love the versatility of the attachment points and how you can totally custamize it.The tree motion leg straps dont really cause me much problems but considering it does not have a built it srt attachment might be the reason-more room- or the fact that the legstraps hang so low due to problem desribed earlier-thak God.I think all 3 saddles have something to offer but are definetly not for everyone.I wish I could switch a few things between the 3 and then Id have the perfect saddle but im sure nobody else would like it the way I would.To each his own, they are all advanced to what we climbed on a year or to ago.I'll post more in a couple of weeks Im sure my guys will start to love each saddle and be unwilling to trade.