I have owned about every sleep monitoring device made. I own a sleep tracker. I owned a zeo. I owned an Up. I even had a pulse oximeter. Then I got a Beddit. Without question this is the most useful and the best design of all. It measures all of those metrics I consider important in understanding my sleep. They are displayed in an easily understood format. Best of all, the device installs between the mattress and my sheets making it very easy to use. To make this experience even better I had a problem with my unit and the customer service I received was incredibly courteous understanding and unbelievably prompt this is one of the best companies with which I have ever dealt. The Beddit product shows their expertise in design and implementation.