I am very happy with my Alientech antenna. In the deserts of AZ I get max signal strength indication on my CS display out to about 2-2.5 miles (can’t see my ARC2strobes past this). It is a much more focused beam so pointing the antenna is a bit more important compared to stock. I like this booster also because it was a nondestructive install not requiring opening of the controller body and it detached quickly (<5 sec) for storage or transport. I don’t personally want large antennae in my way or exposed and more prone to damage. As pointed out above it’s pricey. But regardless of what’s inside the panel it works. Still, it’s each to her/his own.
I'm thinking about trying one myself heck I've tried everything else out there.