I saw this a while back... maybe a year or so ago. Was VERY interested, almost got a kit but never got around to it.
Looked pretty good to me. You lose a bit of meat in trimming with this cuz you have to trim the adhered bag off (you have to trim dry aged meat regardless) I think the main bummer for me was that it said that you have to use their machine... was slightly expensive too if I recall. I do believe that people have modded the food savers to work with these bags... but again it was a while back.
I say go for it brother. I for one would be most interested to see how they work out for you.