Standing desks are great to get you up from a sedentary chair, especially when you are at your desk all day. In my case, a standing desk is helpful to alleviate the pain of a back injury that I suffered in my teens.
I would like a sit/stand convertible desk, however those cost hundreds of dollars and I wanted to be a bit thrifty. This desk cost less than $20 to build. The top is reclaimed from an old shelf, and and I counted it as free.
I also wanted to be able to integrate my musical keyboard into the setup. It came out pretty well for $20!