I'm using on an air rifle, so nice to have PA for shorter ranges. Range of adjustment is only plus/minus 15 MOA, so you should have it reasonably closely centered (shimmed if necessary)to start.
Pros: clear optics across whole field of view, PA down to 7yds,, great customer service at Burris and Optics Planet
Cons: My scope had very stiff knobs - even with screwdriver tough to turn and then jumped clicks. I sent it to Burris, they upgraded to target knobs. took 2 weeks. Not sure why they don't ship with target knob at least as an option. Now very nice.
This review was written in the old system and had content requirements that are different than reviews written today.