I got mine done last summer at the Car Masseuse on Briar Forest and Dairy Ashford. He charges a little more than these other guys but does a fine job. Plus he's been around for 20 years and has a lifetime warranty. I looked all over the city before I settled on him. I've been loving the tint ever since I got it. 35% on the 4 windows and 20% on the back.
http://www.stereoefx.com/ I forgot what type of tint it was...but it is lifetime. I got a Mazda done from there a while back i think it was $70/$75 bucks for all the windows. And I got a 350z done from there a couple months back for $85.
Star Auto Tint on Southwest Fwy, and Chimney Rock is one of the best. This is where the Audi dealerships of Houston send their cars to get tinted. It costs around $150-200. Call beforehand. If you pay a little extra they will tint your car illegally as well. (front tint, limo tent, etc..) http://www.starautoaccessories.com/