I have a tandem pro. Got it last July. I weighed 267+. I am now at 224(after T-day, no less). I know I can't attribute all that loss to just the trike, but boy did it help! My wife lost significantly less(she would kill me for revealing her weight, so I will not, but she has lost 9lbs.) The most we rode at one time was 16-17 miles at a leisure pace. We learned to enjoy the ride, scenery,etc. versus how fast could we get there. When we got off the trike, we were tired yes, but we always wanted to go again. We were tired, not exhausted. Big difference. Best purchase I ever made! As a result, splurged on black Friday sale for some bling. New flag, comfort seats, etc. Can't wait til camping season again.