It's nice. Just smelled it extensively today, side-by-side with some other Le Labos. I wanted to only get 1 today, and it lost out narrowly to Poivre 23. The whole City Exclusives line is overpriced for what they are, IMO, but I really wanted to be able to have one in my collection.
Had Poivre 23 not been available, Limette 37 would've been my next choice.
EDIT: Oh... and I didn't find it as "citrusy" as the name would imply. Eau Sauvage didn't spring to mind right there in the store, but that's not a bad analogy. Point being that it's more complex than a straight summery citrus, and I think it could be worn in at least 3 seasons - excluding colder days in Winter.