Brought in my father's old leather jacket that hadn't been cleared in so many years I can't even tell you, they got it looking good as new.
Did the same thing with a white shirt I had actually stopped even considering white. It was yellow, had old stains on it, just.. It had seen better days, okay?
Got it back looking white and beautiful. I don't know what magic they use to clean this stuff, but its amazing.
Definitely recommend. A bit pricey, but you pay for quality.