Shagpile, the web version is too clunky. For example, you cannot delete sectors from a stored flight file/SPFIB/Flt Not.
Selecting/Printing multiple products is easier from NAIPS for Win.
You can store all your favourite routes in NAIPS for Win.
Running the program from it's folder is the way to go. You can even run it off your thumbdrive. Neat when you're in a strange office but which has a computer.