Really? Parents house was built with them 23 years ago, had a few rooms recarpeted last year, looked like new. No squeeks, no uneveness, what more could you want.Seems like a good recommendation for floor boards, lucky to get 6-8 years out of chipboard.
I would always for 22 over 18 for a house (18 for a attic/garage) but that would be what I would do, screwed down, with pre-planned inspection hatches in areas where they where required for major plumbing or electrical junctions. Take photos of where these are and whats under them.