In the middle of the touristy LINQ part of the strip, right near the High Roller. Pretty pricey for an ice cream sundae, but big enough to share and very delicious. Got the Cookie Dough Sundae and I believe it was around $13.
I've also been to the Ghirardelli in San Francisco and this one was a lot smaller and a lot less crowded - probably waited about 10 minutes for my sundae.
Definitely stop in here for an afternoon or night snack after lunch or dinner!