DVD X Copy Platinum, version 220.127.116.11, is the only DVD copy software I've ever used, and I've never had a problem with it.
A couple things to note though, I don't use it to burn the discs, only to rip them. This is because DVD X Copy places a video "backup" warning on screen for about 7 seconds and which can not be skipped and it places a text file in the root directory with your unique software license number as well. To avoid that, after ripping but while it is waiting for you to put in a blank disc, I use VOBRator and IfoEdit to remove the Backup warning from playback, and then I use Nero to burn the disc so that I can leave out the text file (if you try to manually delete the text file from the temp directory on your HD before burning with DVD X Copy, it will fail). Directions for using VOBRator and IfoEdit to remove the warning screen as well as the FBI warning if you want, can be found here:
It sounds more complicated than it really is. After DVD X Copy is done ripping, it only takes about 3 minutes with VOBRator and IfoEdit to remove the warning screens, and then you just burn a DVD Video with Nero. It's actually pretty simple.
The only limitation is that DVD X Copy was last updated prior to DVD+DL, so I don't know how it would handle ripping with the intended target being a DL disc. I only just bought my first DL capable burner, a NEC 3540A, and with the cost of DL media still around $4.50 each, I doubt I will be finding out any time soon if this really is a limitation The discs I make with DVD X Copy, even when compressed 60% look perfect to me. On my PC Monitor if I look real closely I can sometimes see some artifacting, but I've never noticed any on my HDTV. So I'm quite happy with it.