I love places that have a simple menu, for two reasons. First, you know exactly what you want when you go in to order. Secondly, it's the place you want to go when a specific food pops into your mind. Wadaa is that place when I think of tacos, which happens fairly often since I live in Phoenix.
This place has a really upbeat atmosphere. Always has some kind of high energy pop music and crazy lights going when I show up. Also a very clean store, so major points for that. I usually go for the carne asada tacos, and I'm never disappointed. They have a great salsa bar, with a very spicy salsa option, a smooth guacamole, and all of the onions + cilantro and limes you could ever need. Prices are reasonable too. I don't mind paying $3 per taco for something of this quality.