As one of the earlier reviewers said:
"If you really want to make it indispensible, add the possibility for it to check and notify of new mail without having to open Mail.app."
I agree totally! There is a big gap for a simple notifier that just works. Mailticker was the best by far but has recently died a death. I would happily pay to find a similar application or one to provide this simple notification facility.
Still, a nice app! Thanks to the developer