i had a vis hood on my altima and fitment was PERFECT. no gaps, never turned yellow, nothing. my vis hood on my p5 has some fitment issues. it doesnt wanna sit flat, it has like a warp to it on the drivers headlight. its starting to yellow a lil. but is parked outside, no garage. my other one was garage kept. but the weave and clear coat (besides the slight yellowing) is good. its light, i used hood pins, i do alot for highwa driving. it does flex alot at speeds above 45.
edit: look in my sig at the hood fitment at the top of the grill. the gap is smaller at the passenger side it gets gradually larger by the drivers headlight. thats the warping i was refering to