Having bought some Profile Design T2+ aerobars, and after a bit of building up to it, I'm able to hold an aero position for an hour at a time on the trainer and, apart from cornering, braking, etc, for the majority of the time on long rides. Even the neck strain is barely noticeable after a flat 200.
One thing that is holding me back is finding sunglasses that don't restrict the vision - i.e. without a top bar that's exactly in the sight-line. I wear contact RGP lenses that are extremely susceptible to dust, grit, flying beasties which can be extremely painful and at times quite dangerous.
The pros seem to wear aero helmets with visors which would solve the problem but that's not for me so I'm wondering is anyone has found protective glasses that don't restrict that part of your vision?