This calculator is the cat's meow! (How's that for a play on words?)
I'd say the popularity of this calculator has been skyrocketing lately with my name on the top of the happy users list. I use it for all the usual calculations but analyze the results and then look to the visual indicators like distance, elevation, slope, etc to create my own estimate of how to make the shot. That helps me to learn the game better.
Another indicator of it's success is that Kat has, once again, taken 1st place in another tournament.
Congratulations Kat! And thanks for the wonderful calculator. I really appreciate how much you give to the WGT community.