There are times when I work on a quilt so long that I'm sick of it, and if I actually manage to finish it I think I'll never want to see it again. You may have hit that wall on this quilt! I think it's beautiful, and I'm sure your sis-in-law will love it. But I think you should just keep it put away for a couple of months and then look again. You may like it a lot better then (after you've had time to heal!)