Instead of the reviews I had planned, I might focus instead on the features the community here has expressed interest in as well as others they have not heard about yet.
A piano roll screen offers step recording. There is also a sample editing screen with features like waveform display, setting the start point, beginning loop point, loop mode, normalizing, time stretch, etc. Every area of functionality has a screen, dialog box, or popup menu to communicate with the user through a GUI. All the screens and their functions are printed in the second half of the Owner's Manual for reference.
A large view of the machine:
http://www.samedaymusic.com/media/MV-80 ... 6d6023.jpg
It takes a while to learn the MV-8000. If you would feel uncomfortable learning the MPC4000, then the MV-8000 is going to be equally challenging. An inexpensive way to learn more is to call Roland support and tell them you bought a display model without a manual. The usual charge is $10 - $20 for a manual with shipping cost included.
A computer can access the MV-8000 hard drive via USB. It cannot access the direct memory of the MV, as in the case of the MPC4000 and ak.Sys. The USB connection is activated and deactivated from the DISK/USB button above the dial followed by making a choice in a window. Then a drive icon appears in the My Computer window of the host PC. This allows you to drag and drop files from and to the MV hard drive. Within the next year an editor might be released. If it does become available it would allow offline modification of items such as samples, patches, and projects.