I have been using Roto Static for about 20 years. This is the best carpet cleaning service I have ever found! The carpet is dry in about 3 hours. I always order unscented cleaner as Im sensitive to chemicals.If I forget, Gord somehow remembers! Gord is always available when I need him and he is a pleasure to have around. The results are amazing. He even got wax out of my carpet! He took the time to clean it and I had not asked. He also cleaned some furniture , which also came out fabulous. My carpet is about 20 years old, but everyone thinks its new because of the method they use to clean. No wear and tear, no "deep soaking" which only rots the underpadding and shrinks the carpet. I highly recommend them!