The day after we arrived in Guadalajara, we took a tour on the Jose Cuervo Express to the town of Tequila. In case you didn't know that is were the drink tequila comes from. My parents did a similar tour last summer and thought we might enjoy it... sadly i'm not allowed to drink anything :-( so, it was a little bit weird to watch everybody else around you get hammered...
There are different tours you can book, we had the Premium Plus, which meant: we took the train in Guadalajara and had two hours of free drinks, tequila tasting, food and music... arriving in Tequila we had a tour through the Jose Cuervo Factory with a special glimpse into the Reserva de la Familia cellar. We then got some free time to wander around the town centre and get something to eat. At the end of the tour we watched a dance show with mariachis and a jimador explained how the agave is harvested and then we got back on our train (again free drinks!) and back to Guadalajara (the tour takes the whole day).
I think the town in itself is somewhat bigger than what we saw and i'm not sure if it was because of the weather (we had some rain...), but for all the money the tequila factories acquire, the town looked a little bit unkempt and poor. The centre is well kept, but the surrounding areas are just sad. And if Jose Cuervo makes so much money with their tours, they could really afford to build a decent train station.
Nevertheless, it was very interesting and fun. If you go, take advantage of the discounts and get some good tequila (like Reserva de la Familia or Maestro Tequilero)! Honestly, it's a waste of time, money and opportunity to go there and buy the cheapest tequila in the store... you know, the one that you can buy in every supermarket in Mexico.