I actually think this engagement might stick. They've been on and off for a while, and they just seem to really click and are comfortable together - I didn't see that with his past S.O's.
IIRC, this is his third engagement. He was engaged to Karina - I think it was a bit of a disaster of a split. He also did a Ukranian version of The Bachelor, so I'm assuming he popped the question there, though I know he's said the show is a joke and he regretted doing it.
Plus, Val's reactions seem to point to this one being legit.
I do agree, though, that hideous Pnina's are up her alley. Did anyone see when Karina was on Say Yes, I think for her third engagement...