a-i-s-e-e-s-o-f-t Blu-ray ripper (there arent any hyphens in the name, but it wouldnt let me post if without them)
http://www.*********.com/blu-ray-ripper.html
does a fantastic job of handling blu-rays. Copy the entire contents of the disk to your hard drive. (Allow adequate space, typical feature length films typically range anywhere from 30-50 Gb) Click the load blu-ray folder tab at the top, allow it to load the different segments, select the ones desired and then choose your codec. I've found that using the PS3 H.264 HD Video (1080p)(.mp4) gives what seems to be the best results. It looks VERY close, ALMOST indistinguishable from the original. The compression makes the final file about 1/10th the original file size. So 47Gb is now roughly 4.7Gb using a 1080p resolution and master DTS 6ch audio track. Unless you have fields of terabytes or only a handful (3-5) of blu-rays you want to store, keeping the movie at its original file size is some what wasteful. Obviously we all want our movies to look pristine, but at what cost does this become a secondary concern if we're only able to keep a few them at our disposal. I watch my movies on a 55" Vizio Razr running through an Onkyo 9400thx and can never manage to stop smiling when a movie is done converting because they look amazing. My HP dv-6 laptop can usually copy the movie to my hard drive in about an hour and do a complete conversion to the aforementioned format in about 12 hours, 15 if I'm using SolidWorks and have numerous tabs open. There is some what of a speed decrease while its converting, but for me it seems to be minimal and still allows me to use the computer as normal. If you need all of your processors power, the pause button for the conversion handles the need quite well. Just my two cents.