I love the program and I used the version 0.1.
What I like is this program provides me the ability tip correctly. Most (if not all) restaurants try to suggest the "tips" which it is calculated based on the meal AND tax, which I do not think it is correct. It might not be a big deal if I only order $20 bucks worth of the meal. However, it makes a big different if the meal costs $200 vs $20 (at least, it makes a different on the tax as well).
-- TMO Blackberry 8700g since 09/24/2006