I've used a number of the joystick housing units and the turret housing units. As spotters, I like the joysticks. The joystick housing units are nice due to the quick menu. But for shooting, I definitely like the turrets.
For zeroing, the turrets, for me, are way easier. I wind up "clicking" too far sometimes with the joystick.
And as others have said, the turrets definitely have the advantage with gloves.
A few people who were heavy users, had recoil issues with the reapv1, which is why they changed the battery compartment on the v2. But the v1 has more external battery options and has a dove tail so you can wear it on your head.
I don't use dedicated thermals anymore, but if I did, I'd go with the Halo-LR due to the mil-hash reticle. They have the same cores and even same rear ends as the reaps and hunters. If I had to buy a trijicon dedicated site, I'd get a hunter, it was really designed from the ground up as a dedicated sight and has a more robust mount and a germanium sac lens.