If they're the cards I'm thinking of, they're alright. I'm opposed to manu-patch stuff and this is in a similar vein, but at least it's something that's meant to look like something other than a jersey piece.
I got my Pudge one signed and it came out pretty nice.
I pulled the Aaron from Topps Update and I have a Babe Ruth rookie ring from series 1 this year I believe. I like them but will only go after Red Sox unless I pull one that I want to keep - like the Aaron.