Summary: Keyboard was defective right out of the box. Seems that these keyboards are very prone to hardware malfunction that causes the A,S,1,2,3,8 etc keys to not work. Logitech knows this. I called Logitech and they are replacing the keyboard with a K800, so that is good. Still liked this keyboard though. Average life on these keyboards, based on Logitech support forums, is about 11 months. Keep in mind when buying.
Summary: I LOVED this keyboard - for about the 2 hrs it worked correctly. At that point, the "L" key popped off, and so far neither I nor several computer savvy friends have been able to replace it correctly. (It is a sort of "soft touch" key, with a rubber finger under the key and the key has sort of plastic interlocking frame on the bottom).