It's a very nice quilt.
But I don't think it's fair to diss the SIL if she doesn't like it.
I've seen lovely, expensive, beautifully crafted things that I just did not care for. My liking or not liking the thing had nothing to do with the maker.
I'm glad the quilt is going to someone that WILL like it -
Did SIL give it back to you?
If so, aren't you glad she did that rather than put it in a yard sale for $1.00?
Do/Did you get along/like each other before this?
Just another thought -