I have and I picked up speed due to proper leg/hip position over the pedals etc. Took a couple of hours and a lot of pedaling on a trainer. I ended up moving my bars up 5mm and the seat down about 5mm over the course of the next year because although I was faster I was never quite comfortable so I just went faster for shorter distances. Still, worth it in my opinion because I learned a lot as well on how to measure and set up a bike.