Driver side was a little bit harder as my driver seat might be a bit worn. At 23K miles and 500 autox runs and 20+ track days, I believe my bolsters might be a little bit worn, resulting in the bottom piece not 100% fitted properly like the passenger side. Even with all the problems, I still give this product a 4 to 4.5 star as it truly makes the car nicer and it took less than 3 hours to do
