The Coffee Shop is one of our two go-to breakfast joints when we're in Vegas. In terms of affordable and plentiful breakfast fare, The Coffee Shop can't really be beat. You can count on quick wait times and fast service no matter what busy weekend it may be. The staff may not be the most personable or the friendliest, but they are fast and have never messed our orders up.
I order the Downtown Breakfast Sandwich every time - I think the sandwich was personally designed for my taste buds, and I highly recommend it. My husband likes the Tower of French Toast, as it has different fruit varieties. They also have very inexpensive but heavily alcohol filled Mimomas.
We would never come to The Coffee Shop for anything other than breakfast because truthfully they offer standard sandwich and chicken tender type foods that we can find at home for a third the price, and there isn't anything memorable about the restaurant - it's very bare bones and diner-y. But breakfast? It fits right in and they do it well.