I have used the demo version of LB pro, and although the interface looks pretty, I was slightly dissappointed with the fact that you have to 'click' then type in the times. It would be better if you could set the interface up to allow you to simply type in the times etc without having to click-enter them.
Also, I have tried using Excel, but I cannot seem to get it to calculate flight times when I give it out and in UTC times. You think it would be a simple process, but noooo...
Anyway, that's my $.02.
-CaKe