John Francis Robin
Good compromise between ease of use and ergonomic design. The keys have a good action, and are fairly quiet. The built in wrist pad makes long term use more comfortable. Battery life seems good. I never really used any of the grey keys, so I cant comment on those. This is the second unit Ive had. The first lasted about 2.5 years of heavy use: about 7 hours a day, 5 days a week. After lots of use the keys were not working quite as smoothly, although all of them still functioned. 2017.03.03 UPDATE. My second unit failed after about 10 months of heavy use: about 6-8 hours per day, 5 days per week, in a clean office environment. Mechanically it was in good shape, but it increasingly began to skip characters or hesitate in transferring data to the computer, resulting in me often having to go back and retype characters or words. It was subtle at first, but increasingly frequent. When I swapped it for an old, USB wired keyboard, the problem disappeared entirely. I notice that the keys on the new unit are noticeably stiffer than the old unit, but I remember seeing other comments that the keys seem somewhat stiff initially but relax after a little use. This seems consistent with my experience. I like this keyboard for its ergonomics and performance, but two of the four units Ive purchased required replacement: the latest one, after only 10 months use. For that reason, Ive dinged my review rating from 5 down to 4 stars. I recommend this model, but if you buy one, consider getting an extended warranty, and keep your receipt.