Although most reviews were very good, and this little unit today is the number one of 100 in physical therapy leg exercisers, some reviews had me a little concerned about how smooth and easy the pedaling would be. I couldn't wait to use it and see which side I would fall on. I needn't have worried. It immediately worked smoothly and pedaled easily and quietly. If you look at my video, the background noise is from the kitchen, not the device. You can hardly hear it when you're using it. It easily goes from no or very little resistance to medium resistance, and the monitor works exactly as described. The battery was already installed. I have it on carpet. It doesn't move around when I'm pedaling and it's not up against any barrier. I can sit comfortably in my chair and pedal to my heart's content. I love it!
It's exactly what I wanted, and I did also want to mention that I got it from Amazon Resale (formerly Amazon Warehouse). When I started to purchase it, the offer for the unit in "Used Like New" condition popped up for half the price! I have found that items that are "Used Like New" are just that, like new, and the price was great, so that's the one I got. It arrived in perfect order in its original box, which actually appeared to have never been opened.
I enjoy using this little exerciser, and I already know it's going to help me improve faster. I am thrilled with this purchase. I highly recommend this Mini Exercise Bike!