I bought them and love them. They work where I expect them to when I'm mixing. API on drums, Neve on guitar, Fulltec on Bass, etc. The Graphic Neve is really nice on snares. I couldn't really see them being used in mastering, mainly because they don't perform well when very high levels are going through them. They are equipped with level trims which help, but that's not something you would really have to mess with the same way with their analog counterparts, and quite often you'll want to overdrive the analog units for that extra something-something. They do have demo's available.