I freakin' love this place! Considering that most places in Vegas and especially ones in the casinos are expensive, BLT is actually inexpensive compared to everything else around it yet it serves a couple of the best tasting burgers I have ever had in my life.
I tend to venture around looking for good food with even better deals but during this time in Vegas, my friend and I went to BLT three times throughout our stay cause the food was just that good.
I would go classic/traditional for your first time (if you're a lay burger-connoisseur like I am) and if they can nail it with something traditional, pretty much anything else on the menu would be to your liking. They're pretty creative with their recipes and they don't mess up or slack off with the classics. Go with the waffle fries ;) ;)
The service is also great and accommodating and the t-shirts the staff wears are pretty funny with their burger-related puns.