Range ...Range...
I am not a big crossbow fan nor am I big fan of every tom, dick and harry who wants to put out a supplement with "for crap" feats and classes just fill their book.
.... However with that said if I was to use a crossbow I would reach into the Sword and Fist and pull out the "Great Crossbow"
Reason being is that it ignores armor and shield modifiers. (if I remember correctly... looked at in the store a couple times) and... it has a range of 150ft.
Now with that in mind I start having flashes of "Quiggley" the crossbow user with his "Sharps magically enhanced" crossbow of distance. Which puts his first Range increment at 300 ft (or 100 yrds) Now depending how you view "far shot" feat (no SRD infront of me here) you could make that 450ft. or 375ft.
Stacking rules probably make it the 375ft or 125 yrds.
Ultimately it means that you could be "sniping" armored knights at nearly a 1/4 of mile at just a mere -6 to hit (no armor). The deep woods sniper out of the Masters of the wild gives another 10% which pretty much takes you to the 1/4 mile mark and the bolts are keened, crit threat range is now 17-20.
Anyway like I said I like the core rules but this seems like it would be fun to squeeze afew of these off and then hide like a mother.