Advertised as an "Amazon's Choice" product, the Exerpeutic Folding Magnetic Upright Exercise Bike ($149) has a 4.5-star rating and over 8,000 reviews. Just like the BCAN, I love how easily it can be tucked away after a workout. It features eight tension levels to choose from, as well as an LCD monitor that displays calories, time, heart rate, and speed. The best part: this bike has a large padded seat for extra comfort.