Which platform are you referring to (pistol or rifle)?
I have used their parts in several 10/22 rifles and 22/45 pistols. Their extractor is first rate and is in all my Ruger .22 shooters. I have four pistols with their trigger and sear, and two with their hammer. Honestly I will only get the trigger and sear from now on.
I have sent several pistols into them to have work done, and was always satisfied and felt the prices were reasonable.
This is my baby, <3 this pistol.
On the 10/22 platform the KID trigger is superior, but you will pay for that. For the money the VQ parts are perfect for anything but the serious benchrest shooter.