Jalapeno's is my favorite lunch destination, as their food is absolutely delicious, service is always amazingly fast and friendly, and you absolutely cannot beat the prices. My lunch there, including tax and tip, is under $5!!
The only con with Jalapeno's is that the hard tacos are not at all suitable for takeout, as the juices from the meat soften the shells and ruin the overall flavor. That's not the restaurant's fault, however, just one caveat to consider when ordering to go.