ATA is ATA and its all in preferance to the shooter. When they first started hitting the market, the biggest seller was its so compact and versitle in the treestand. I don't care if its a 30" ATA or a 42" ATA; it all comes down to the brace height. If you've got a short ATA bow with a brace height of 6 1/4", it'll eat your lunch and the same goes for long ATA bows. I've got a 39" ATA bow with a 6 1/4" brace height and its not forgiving at all, you bobble what so ever and the shot is histroy. Shorter bows with more parrell limbs allows for a greter brace; equaling a more forgiving bow to shot. As for a trestand bow, I can only think of one occassion that I needed a shorter ATA bow because it was hitting a branch, but that was a high risk shot anyway and I ended up not taking it on a deer directly behind me. Beside, if I would have taken the time to cut a branch out of the way ATA wouldn't have been a problem. Pesonally I won't own a bow under 37" ATA, there is no advantage in my opinion. The parallel limb concept is taking away rom the limbs are supposed to be used for and that is absorbing most of the shock from the shot. The risers are taking most of the shock now fromt he shot and the only thing the limbs are serving as is a holder for the cams or wheels. JMHO