In reply to FreshSlate:
I have the expensive ones CU, think they are great and apart from easing sore neck,
also encourages you to concentrate on your climber as thats practically all you can see.
No experience with cheap versions, presume they will work fine, I'd imagine from the
adverts just not as comfy, light, optically bright etc. Bit like most things really.
Worth 90 quid -depends on you.