I have one, but as it is my first release (used fingers till I got it) I do not have much to compare it to.
I have been using it for around 3 months, and use a D loop.

I think the action is very smooth and like the fact that the jaws close automatically rather than the trigger being pushed forward.
I found the trigger itself a little bulky at first, but have gotten used to that.
The head itself is quite bulky but in practice I have not noticed that it affects my anchor or the use of the release.
The body of the release is quite long and I have it adjusted as short as it goes which fits me fine, but I have reasonably large hands so anyone with smaller hands may find it too long.

Hope this helps.

I guess in the end the best way to find out about it, as you have one is to shoot it and see.