DO NOT shoot off the string!I've done both and I won't go back to shooting from the string for this reason. It's dangerous. Here's why.

With a short ATA bow (33" in my case), the string angle becomes big enough that the nock gets pushed slightly off the string at full draw. Twice I had arrows actually fall off the string at full draw - just milliseconds before I squeezed the release. I nearly dry fired my bow and it scared the ***** out of me. If you ever have to draw on a deer and let down and draw again, you're screwed unless you shoot a loop. Next time you shoot off the string try letting down and then look at how the nock is attached to the string. If the arrow didn't actually fall off the string, it's barely on there.

That won't happen with a string loop. With a loop, you can draw and let down all day and that arrow is still firmly on the string. No chance for the arrow to fall off which could cause a missed shot opportunity or worse yet a dry fire. I don't know why more people don't talk about this when discussing loop vs no loop.