It's made by HK
It is not something that many people have
It is accurate
It is piston operated
It is pricey...
Doesn't really do anything that "cheaper" ARs don't
Not to get into a spitting match about DI vs piston, but until piston-driven systems are standardized, I see piston driven ARs as more of a con than a pro. Parts are not interchangeable and if there is a problem, you can't go down to the LGS and get replacements.
If I was in the OP's position, I'd be looking at an ACR.