Bri, mine only takes 90 minutes but I ask my stylist not to wash the product out. I get a shampoo, application of the BB solution, blowout and flat iron. I skip the final wash, masque, blowdry and flatiron.
I get mine done every 12 weeks. The more you do it the better the results. My hair feels softer and smoother, the drying time is shorter, less frizz, I can wash and airdry without product or fuss, I can easily and quickly blow my hair out with minimal time and effort and I don't have to flat iron it if I don't want to.
I'm very much a no fuss person when it comes to my hair. This is probably my 5th BB and I JUST started blowing my hair out (rather than air drying and/or passing a flat iron through quickly after it air dries). I never thought I could do it and it seemed like too much time and effort. My hair is really long, almost waist length since I chopped off 3 inches recently. I've tried it about 3 times now and it gets faster and easier every time. I'm so surprised at how fast it goes and how great my hair looks without flat ironing. I love the BB!!!