My in-laws are pretty great. My husband and I had to live with them for a year after I moved here, and they were always careful to give us our space and to make sure that we didn't have too much conflict. They've helped us out a lot financially over the past 10 years, and now they're helping us buy a house. They've always been welcoming and accommodating with me, doing things like trying to have Thanksgiving at their house, and letting me make American food on the 4th of July. They get along with my family and my MIL and my aunt actually email each other regularly. My FIL got on a plane for the first time in his life, after 65 years of completely refusing to fly, so that he could go to the US and visit my family.
You hear so many jaw-droopingly awful in-law stories, I feel like I really lucked out with mine.