Saw all the rave reviews for both locations and had to check out Eggslut at the Cosmopolitan.
I had an overall average experience. Food was okay and the cost was expected so I was able to focus on the quality of my sandwich.
Arrived around 10 am and the line was ridiculously long so I decided to come back later around 2 pm after some shopping and there was no line!
Ordered The Fairfax with sausage and bacon.
The eggs were way too wet for a breakfast sandwich resulting in all the contents slithering out from between the brioche buns and making a huge gooey, greasy, cheesy mess. Brioche was too thick but flavorful and lightly sweetened. The bacon was decent and had a little fat to it. The hand pressed turkey sausage breakfast patty had a nice kick to it. I would stick to either bacon or sausage next time, not both, and make sure to get extra napkins. There is also a fancy sauce they put on that has a little punch to it as well. It is a big sandwich. You could definitely split one.
Coming back to try the Slut and possibly another sandwich to see if it's worthy of another star.
What I really like about Eggslut is the short menu. There are limited choices but I would order any of the sandwiches.