I started off with the picatinny mount, then upgraded to this base for my MKIII. A little pricey but offers a better sight picture and cleaner overall look to the pistol.
Pros: Easy to install, solid, well made, cleaner looking pistol.
Cons: Pricey for what it is, instructions a tad vague
This review was written in the old system and had content requirements that are different than reviews written today.