I never had one, but IMHO If this is your way of getting steps in than it's totally worth it.

I started getting really busy at work lately and stopped working out. After a while I would start feeling horrible after my 10 hours workdays at my desk.

I decided to start spending my lunches taking a walk at the local park and I am feeling great ever since.

The point is, find a way to MOVE and if this is it, then go for it!