I find the staff to be incredibly nice. To date, I've never had a major problem with their service. Over the last couple years that I've been going there, I've definitely saved a substantial sum of money. This was especially helpful as a student.
Now of course, for the lower price, the chemicals can't be top-notch quality. It's simply unreasonable to expect high quality chemicals for $3 per article of clothing. They wouldn't be a financially solvent business for long if they charged that low price and used the expensive chemicals.
Bottom Line: this place does a phenomenal job and they're inexpensive. And the staff is usually very friendly. You're crazy if you don't go here for most of your stuff.
I recommend this place to all of my friends and they love it too.