Yeah, Scott's WarP is the bee's knees!!
The Flex came with a grip similar in shape to the one you have Scott- just w/o the swappable panels. It was too short of a LOP for me, hence going on a search for an adjustable grip. The one I chose seemed to be the best choice for me. Again, only real grip is the size of the thumb shelf. But to be fair, the grip was designed to go with an MDT chassis, which has a built-in thumb shelf... I still do like the grip so far. I won't really know how comfy the grip is until I'm behind the gun shooting it.