My cat loves these!
We bought a pack of Grass Bits for our mostly indoor cat, who does have access to the garden, but is quite old and chooses not to go out much. We also tried growing cat grass in a pot for her, but she showed little interest in it, so I am glad that she is getting some grass through these treats.
Interestingly, our other cat, who spends lots of time outdoors & regularly eats the grass on the lawn, shows no interest in them at all.