I'm am sitting on the fence with this one.
If they are the right "fit" then they are excellent, but if they are not a very good fit then they are terrible.
Normal sporter stocks are much more forgiving IMHO
My mate has his CZ 527 .204ruger fitted in a laminate thumbhole pattern richards microfit stock and i must say it is the most comfortable rifle i have ever put to my shoulder.........awesome looking stock too