Was talking to a fellow HELIX user on the FB HELIX user group who said he rather likes the more conventional looper thing where you tell the looper when you ve reached the end of the loop manually rather than working to a fixed bar-length. Personally i prefer the way GTL does things but thought i'd pass it on here anyway.
Here's how he put it:
"one advantage of the native [HELIX] looper (I know, it's hard to find those...) is that the loop is defined by your start and stop commands, even if you're not exactly on the beat. When playing live, especially in a group, this makes life easier than if you need also be right on the last beat of the bar..."