The strength of "WriteOn" is that it's short, it lets you immediately know something about the product, and there's a pun on "right on". The weakness is that it is bland and not exciting. It's also anchored to a particular product line.
If consumers already know they want to buy a generic item, and are going to pick them out of a stack in a store, then a name also screams what the product is might be best.
If the product line is going to be supported by advertising, then a name that will help draw a favorable comparison and exploit the weakness of your competitor's name might be best.
There's also the issue of whether you are going to try to capture a certain market segment (e.g., high end).