This is where d20pro truly flexes its muscles.  Combat in 3.5 is tedious and complex, requiring a lot of bookeeping for effects, durations, named modifiers, and sheer numbers as your PCs attack 4 times a round while under the effects of Haste, Bull Strength, Enlarge, Rage, and Prayer.  Then they have +2 flaming, frost, acidic scimitars with 15-20 crit ranges and sneak attack!  To make things worse, it's always that ONE player that doesn't seem to have a firm grasp on addition...

It's enough to make many of us throw our minis out the window.  In fact, we did - and we made d20pro.  Welcome to the tool that lets you get back to the roleplaying and away from bean-counting.