True, setting DVD Shrink's optional enhancement's like sharpness, smoothness, etc... and advance analysis does significantly increase the waiting time. However, even without tweaking these settings in Shrink, Recode for me is definitely faster with or without all of its quality settings applied as well. I think it benefits more from my specs than Shrink. Some softwares are better than others at using your particular system to its optimum. I believe this to be the case with Recode.
I do agree that Recode has a rather unsophisticated gui. It's too simple compared to Shrink. Recode definitely lacks Shrink's ability to rip to harddrive much like DVD Decrypter. Moreover, I find more success with Shrink with difficult to back up movies that are using some of the newer protection schemes from the likes of Sony, New Line Cinema, Columbia TriStar, etc...
Most movies that I backup with Shrink are more compatible with my software players (WinDVD, PowerDVD, DirectDVD ES, etc...) and standalone consoles than those done with Recode. Therefore, Recode is definitely more of a hassle. But Recode gives me slightly better image quality when viewed from the naked eye at least. Then again, "Beauty is in the eyes of the beholder."
I do wonder about one thing with Recode. Since the author that developed it for Nero is the same author who developed Shrink, I would think that the newer Recode would be much better at dealing with newer protection schemes from Sony and others. I would think that Recode should have been a newer improved version of Shrink. Apparently this isn't the case since most people in various movie backup forums like videohelp, cdfreaks, doom9, and cdrlabs have reported more success with Shrink over Recode when dealing with difficult to back up movies. But then again, Nero isn't exactly the best at adhering to customer complaints. Nero may be working with Sony for all I know. That would partly explain why Recode can't back up movies with the newer protection schemes like Shrink.
Ultimately, for me the combination of DVD Decrypter (latest build) and DVD Shrink (latest build) works the best. Quality and speed in Shrink aren't quite as good as Recode's, but compatibility is much greater with Shrink.
DVD Rebuilder and CCE SP offers exceptional quality at the cost of a significantly long encoding time (typically 4 hours and up). I stopped using it do to the ridiculous low tolerance level of the software. If you slightly preprocess the ripped movie with other authoring softwares before running it through Rebuilder, you can expect to see quite often errors like "buffer overflow, cyclic redundancy, angle errors, etc... Sometimes, even if you didn't preprocess the ripped movie with any authoring softwares, and the only thing you did was rip it with DVD Decrypter to your harddrive, you'll still get those errors. The author of DVD Rebuilder is a rather proud individual that refuses to admit that his software has problems coexisting with other authoring softwares that dvd enthusiasts find most useful when backing up their favorite dvd movies. Another thing is that the software continues to be in beta. Works great for some movies, but not so great for others. Compatibility is a huge problem with this software. It may produce awesome backups, but at a huge risk of being less compatible with many standalone consoles (specifically progressive scan ones). Sound sutters, video stutters, etc... are just a few symptoms of dvds backed up via DVD Rebuilder. Nice but still has lots of problems to be considered as a reliable source for backing up your dvds.