I couldn't see owning a sequencer that didn't have built in audio quantizing and editing tools like audiosnap. I don't use it a lot, but when I do it's the only thing that works. It would be like buying a full-furnished toolbox that didn't have needle nosed pliers in it.

Anderton
The way I usually use AudioSnap makes it indispensable to me. I set the Edit Filter to Transients, and adjust individual transients to line up things like guitar chords if I need them to hit right on the beat. This tip details the process. This tip gives some background about how to tweak AudioSnap's Transient Map.
 
I've also found AS useful for locking bass to drums.
 
Here are some articles on AudioSnap applications you might find helpful. They relate to older versions, but the capabilities are still there.
 
http://www.soundonsound.com/sos/may10/articles/sonarnotes_0510.htm
http://www.soundonsound.com/sos/mar07/articles/sonartech_0307.htm
http://www.soundonsound.com/sos/nov11/articles/sonar-workshop-1111.htm
http://www.soundonsound.com/sos/sep11/articles/sonar-tech-0911.htm
 
AudioSnap's effectiveness varies depending on the timing grid. It's very easy to use on something like a drum loop with defined transients, plucked or struck notes, etc. For sustained sounds, it's more fiddly. A good rule of thumb is that anything that's easy to convert into a REX or acidized file is a good candidate for AS.
 

FastBikerBoy
 I also wouldn't write off the prochannel as just another load of fx. If you've never used it not only do most, if not all of the modules sound great but there is a convenience there that you don't get with regular FX in the FX rack, although plugin recycling has improved that greatly with fx, with the prochannel they are already there to use without having to bother inserting them.

I agree that the ProChannel is about workflow as much as FX. But also, it has effects for which I don't have equivalents. The Tube distortion is outstanding when you add a slight growl to electric bass. The Console Emulator is generally very useful and the Tape Emulation can do very cool things with acoustic guitar, drums, and bass.
 
Platinum also gives the Blue Tubes effects, which are more "vintagey" if your tastes run along those lines.

 
Man you are a teacher and a helpful resource!...I have been trying to use this audio snap in x3e, and changing that audio to midi, so I can score the input....not working so good, and then Platinum came out saying they tweaked it to perform better...Now you post all this info....Thanks man!.
 
I Got to get this method working now.
 
Regards and cheers for those links!.