For unencrypted DVDs, you can just drag the DVD to the HD and the Finder will copy everything. You can use DVD player to play it by using the Open VIDEO_TS file command in the File menu. I've done this dozens of times, long before this product was out.

If you have encrypted/protected disks, well, legally, you're not supposed to use Handbrake or anything like it to "rip" the files from the DVD.