No. They break (even the good ones) and they everyone I know who has bought one sits down all day anyway after about 3 months of fad and blogging about it.
Get up and go and have and amble around once an hour. And have a good walk at lunch or after work. Cheaper and better.
Get up and go and have and amble around once an hour. And have a good walk at lunch or after work. Cheaper and better.