As a local it's one of my favorite lunch spots
The thing that I like about Grand Lux is that it has a good menu and is pretty reasonably priced. Some restaurants on the strip can be $$$; Grand Lux gives you a break from that.
If you're near The Venetian | The Palazzo Grand Lux is definitely a convenient place where you can be served well and have a pretty quick meal, and yet you're in an environment where if you want to have relaxed conversation and sit a while you won't feel "rushed".
They dish out a lot of food
We discovered after first meal to never order two entrées again, the amount of food they give you certainly is worth the price. At first I thought it was on the higher end cost wise until I saw what they delivered. We ate almost every meal here except those special nights when we ate at fine dining establishments. The food is excellent, service quick, very friendly staff. Every day we arrived and left not one, or two but several or more of the staff welcomed us or wished us a great day. Menu is quite varied, much to choose from regardless of the day or time, If you are staying at The Venetian, there is a location there too. Restaurant is same side as theatre where Jersey Boys are performing