I have had the 35 (everything but the printer) for seven years now. It has been utterly reliable (discounting a spider buiding a funnel web in the start sensor well) even under the lowest of light conditions -- even light drizzle. When things warrant/conditions match I'll take the orange shades off and just let it look at the sky w/o any problem.
There are two key things required to make it a no-brainer:
(a) A good tripod which is rock solid but easily 3D adjustable w/ minimum fooling around.
(Manfrotto 390Jr in my case)
(b) A short/wide gun case that allows you to keep the sensors/support rod assembled/in one piece, and accepts the tripod/shades and computer unit together inside it as well. (I think it comes in such a case now when bought new.)
It is 1990s technology (the computer housing could be smaller), but it's bomb-proof, does all the usual computations for Hi/Low/ES/SD/Ave etc required and the the size of the bullet window is a godsend.