I wanted to put a small medicine cabinet to the side inconspicuously complimented my mirror for extra storage. This worked great. Holds more then I was expecting. I like how the door is mirrored inside and out do you can use it if you want a close up. 
If setting up like I did though, be sure you also get a small clear cabinet bumper. The door isn't soft open or close and tends to swing into the main mirror pretty hard. So I just added a discreet bumper to the top right corner.