I would like to have cessna or piper style belts in mine. I do not see the need for a 4 or 5 point harness in my cross country plane. If I need that type of seat belt then it means lots of other things have gone wrong.
but I would not recommend them for a 10. Though very snug and secure, Linda (my CFO) says they are heavy, and I would consider them overkill unless you plan on some serious acro in your 10...