Yea, it was a cheap bike but ever since I've gotten it, I can tell that my calves and thighs have grown considerably, especially after doing "Prefumo Canyon Runs", which is literally a 2200 ft. climb from my driveway to the very top of the canyon. My gf is bringing me a IRO Mark V tomorrow so that is going to be my commuting bike. I can't wait to see the difference!