Does anybody have a successful experience fixing a car seat in honda fit/jazz with seat belts NOT isofix?

Which brand do you use (hasle free)?

The seat belt in my car is too tight to go around maxi cosi (for infant), so I don't usually take it out of the car. It's so much hassle getting in and out of the seat with my lo wearing a Palvik's Harness and she's in bad mood/very upset afterwards. Any advice and input would be appreciated. TIA