Product review (5 stars): Cat loves them, and they work
I have a longer-haired cat who grooms a lot and therefore gets hairballs pretty regularly.  She hates the hairball treatment from the tube, so I wanted to try something that I hoped she would like more. Well, she absolutely loves these.  Maybe just got bored of the other treats I used to give her.  It's been a few weeks now, and I've seen 0 hairballs on my carpet.  (Usually by now there would be 2 or 3.)

My other cat though was kind of hesitant.  She's a cautious (scaredy) cat to begin with, so change is probably more difficult for her.  She'll eat them, but I know she liked the old treats better, so I'm still going to get some of them.

My recommendation would be to test this out with a single package first before doing a Subscribe & Save.