Luca's is a really odd space. It's a restaurant housed in an old church. In fact, this church (according to our server) was the very first church in Vegas ever. I believe it too based on the size, shape, and design of the interior.
Luca's serves up breakfast and Italian which is another oddity about the place because those two things in combination seems like a strange choice, but there you have it. They only serve breakfast until 10:30 so if you get there after that you've got to go with lunch options.
They do offer a really cheap salad and pizza buffet, but I would say the choice and quality of this buffet do match the price tag. After all, you're going to get what you pay for. After looking this over I decided to go with an Italian sandwich that I really enjoyed. It was basically mozzarella and Italian meat with a tapenade spread on a delicious bread.
The prices are pretty low and the service was nice so I would possibly be up for trying it again if I lived in the area. However, it wasn't so remarkable that I'd make a conscious effort to go again just on a return visit to Vegas.