For myself it is a total deal breaker. If it is not made of high quality German Vulcanite, I don't want it. If it is not flat and thin, I cannot deal with it. If is is rounded in any way, I will junk it. I am so anal about my stems I wonder how acd I really am. Anyone else a stem freak like myself or it isn't a big deal like I think it is. Oh yeah, acrylic stems sucks balls for my tastes.