I use an SRM Dura Ace, so it's not too bad to move it between my TT bike and Road/Crit bike. Soo, I ride it 100% of the time. Also, having an SRM over a PT allows me to run it with my training wheels, Carbones, or even the disc on my TT bike.
I don't know why people don't like looking at it during a race. I ignore it 99% of the time, but there's that occasion where it's helpful -- bridging, attacking, etc, it's nice to know your CP values and know how to pace it. Even then I don't use it a lot, but it's still nice to know what's going on with you.