If you're looking to just sail Grenada (and not go to the Grenadines), it's a lot less comfortable than the BVI. The anchorages are mostly on the south side, and they are quite deep (with the exception of Prickly Bay -- which is full of cruising boats, and our first attempt at anchoring there dragged up an abandoned anchor). There are few moorings, so you will be anchoring.

Also, you will find that the seas -- which are generated from the trades and have a lot of fetch -- will curl into the anchorages, so that nights at anchor will be rather roll-y.

On the plus side, Grenada has a wild, rugged beauty; minimal cruise ship traffic; rich and varied local cuisine; beautiful beaches; and some of the friendliest people in the Caribbean.

And, of course, it is a good jumping-off point to go to the Grenadines, though the run from Grenada to Carriacou is a longer one and can be very uncomfortable (with beam seas).

See my long-ago trip report here: Sailing Grenada