I've upgraded to the new version 19, and I must say that I like what it offers. The new feature additions make it a real upgrade.
Feature detection has improved, which makes the retouching more focused on the actual 'problem' areas. Skin quality has improved a lot (it looks even more natural), and there are many new controls that allow to tweak the results in a very detailed way.
Although I'm usually very conservative with the Face sculpting features, they can help when applied with moderation. Even facial expressions can be controlled realisticly, with a choice between changing the smile, frown, surprise, interest, and thoughtful expression.
The improvements and the Black Friday discount made upgrading a lot less painful.
Cheers,
Bart