It does very infrequently quit for me too- but only when initially loading the pictures at the beginning of the process. Otherwise no problems.

This version is extremely fast with the Mac Pro- it processes 4 pictures at a time which takes a total of about 36 seconds (this averages to just 9 seconds per picture). Lots faster that the pre-Intel version of the software.

I starting shooting exclsively RAW files a few months ago. This led to a big improvement in the average output of pictures over and above using it to process JPG images from the camera.

The color conversion aspects of the new software are fun. I can turn color into black and whites that look like they were shot with Tri-X film. Just when I was finally getting the hang of using Channel Mixer in Photoshop I no longer need to because of DXO. You can also automatically massage your color pictures into Fuji Velvia look-alikes or any of a large number of other formats.

Try taking a picture with a superwide lens looking slightly up and look at the keystoning. You can take it out with Photoshop but you can do it 10 times faster with DXO if your superwide lens is covered by one of the DXO lens modules.

Check out Ken Rockwell's web site for a real look at what this program can do:

http://www.kenrockwell.com/tech/dxo/optics-pro.htm