Tex-Mex is Tex-Mex for the most part, but the Lone Spur seems to do a pretty good job trying to make it a little more interesting.
Location is great, parking is free and plentiful and they have a pretty sweet outdoor patio during the summer months. The bar is separate from dining, but you can still get food at the bar. Choose your priority when choosing to dine-in or sit int he bar. If you sit in the bar you typically get faster service - and the drinks flow faster. They know their customer and cater differently to the bar vs. dining experience.
You must get the guacamole, it isn't really any better than guac at other places, but they give you colored chips, which I love - and lets me honest, its guac, a requirement when eating Tex-Mex.
They have an extensive menu and the portions are quite large, very easy to share a meal. I seem to always go back to the same two items, taco burrito and seafood enchiladas (can't remember what they are actually called on the menu).
Service can be slow sometimes, depending on the time you go, but they are always very nice and keep your glass filled. They also don't get mad if you take forever to make a decision since the menu is quite vast.
Happy hour is pretty great. I used to come here and sit in the bar far too frequently (I lived just behind them). Half priced apps and drink specials daily. They have a nice selection of margaritas, too.