We tried using a stick-on whiteboard and had dismal results. The writing surface was not smooth, since the thin material was going over our (bumpy) painted wall

We tried using a stick-on whiteboard and had dismal results. The writing surface was not smooth, since the thin material was going over our (bumpy) painted wall. Also, the adhesive would come off after a while, making us tape the whole thing down. Replaced it with a more traditional whiteboard.