I crocheted for years before taking up knitting last summer. I have only used crocheted edging on a knit item twice, I think. The combination is IMO great. I expect that in days to come I'll combine the two more.
I saw your sweater and love it, love it, love it! A great example of why knitters might want to learn to crochet and crocheters might want to learn to knit.
This is the last time I'm frogging this project for the last time.