Valle Luna is simply a good, basic go-to spot to fulfill your Mexican food cravings. Portions are pretty decently sized and tasty. Both the mild and hot salsas are good, served with a generous helping of chips. Service in my experience has always been friendly and quick, even when they're busy. Margaritas are actually pretty potent, if not outstanding in taste ( but not bad, by ANY means ).
Overall a solid destination if you're up in the North Phoenix / Cave Creek Rd. area. While I don't get there too often, though I live in the area, it's considered a staple spot for us. Go check it out.