I've ordered Vit's a few times now and I really like it! The same guy has delivered my pizza each time I've ordered and he's really sweet. The delivery never takes a long time, I get what I ask for (nothing missing) and everything tastes good. :)
I've only had the pizza and mozzarella sticks but I definitely recommend them. The crust isn't too thin but I don't think it's thick at all but my favorite part is the cheese! I don't think Vits is similar to Dominos or Pizza Hut and to me, that's a good thing. Vits is a little pricey but it's worth it, and it's not like expensive or anything.
Long story short: Vits is my favorite pizza place I've found in Vegas. Don't go by the bad reviews and try it for yourself. :)