Glad somebody posted a link to the thread I started a while ago.
[i,g]http://img.photobucket.com/albums/v612/SVonhof/moto/IMAG0516.jpg[/img]
I still use those plugs every time I ride and I only have an issue with discomfort when I am on the bike for 3+ hours in a day. And that is just minor discomfort, nothing to cause me to remove them from pain.
I have never had luck with the foam ones as I can never get them to seal properly. I like the custom ones I have especially for the fact that they DON'T filter out 30+ DB of sound, and take the edge off the engine and wind noise, but still let me hear things like sirens, music or people talking when I stop to show my badge when going in to work in the morning.