we're struggling to find a group 1 seat that will fit my mums Honda Jazz. halfords tried out a few today but declared them as buckle crunch. But then the guy tried a Britax Renaissance and said that even though the entire buckle was touching the plastic frame, it was OK. He said it was because it was flat and not being strained. Britax fitfinder confirm that it is OK in this model of car. I just wanted to be sure I fully understood why it was OK and others weren't. It's not my first choice of seat - would prefer something with better safety reviews but they didn't fit. And it's pretty expensive (in Halfords anyway!).