I'm not sure why someone downvoted this comment. They said it was their opinion, and personally it mirrors mine. It is quite a nice little web app when you look at the demo, but I cannot imagine that people will pay for it - there are just too many other options available to people.
Thanks for the links. Evernote is a really nice service for keeping notes, but not really for goals tracking. Joesgoals is also nice, but not maintained currently. Excel... well, one can probably do pretty much anything there. And of course, I'm not trying to compete with paper, pen and friends.
1. The people that like to track everything probably can also use custom spreadsheets, e.g. in Google Docs.
2. Keeping track of your cigarette or food consumption will probably not help you quit smoking or loose weight.
3. There are already competing sites that look more polished and seem to have more features.
4. (For me) the best way to remind myself of something is putting a sticky note on my monitor. :)