Very smelly but they last for ages.
Molly my Cyprus Poodle takes absolutely ages to chew through these, and seems to love them. She smells atrocious afterwards and has to have her face and paws washed, but I'm sure she thinks it's worth it. This is the only chew I've seen her try and bury rather than let me take it off her when she has to come in, so it looks like it's her favourite.