I know a few friends from flight school that went the custom molded route and they loved it. We use an earplug now that has a speaker in it so it both cuts down on outside noise and pipes in ICS and radio chatter much more clearly. I dont wear ear plugs in my race car cuz normally its not that loud, but since Ive started driving in traffic much more, Ive noticed that has more of an effect so I might switch to wearing ear plugs. Ive never had an issue with cheap foamies, but they aren't very durable. The generic reusable ear plugs that have been size fitted and look like an acorn have worked much better when I remember to grab them.