metalliqaz: any rests in general, or tp4tissue's "whole arm-rest"?
For me it the chair/its armrests really do make a difference (well, everything makes a big difference, of course, but my work doesn't have the luxury of ergonomic proactiveness). The arm resting on the desk thing certainly can't be good for my back in the long-term. But, it's still better than no arm rest, or an armrest that's too high or too low, which was giving me short-term/immediate arm and shoulder pains.