I have been pretty good about wearing the upper retainer. It's not uncomfortable and sometimes I even forget that it's there. The real issue for me is eating in the car... I do that a lot because I'm on the go quite a bit. So, rather than dig out the retainer case, I've been just setting the retainer on my lap...and then completely forgetting it, getting out the car and walking away. So far, I've been able to find it each time - on the floor of the drivers side, next to the curb (in the dark!) at my parents' house, etc. Eek. I do the same thing with my cell phone sometimes - I'm lucky that nothing ever breaks!
First real winter day of snow today and a blizzard forecast for tomorrow. Fun!