I think I would have liked the FC660C. I once had an HHKB2, but using the Fn modifier for arrows was too much. I have to say, I found the Kinesis Advantage to

I think I would have liked the FC660C. I once had an HHKB2, but using the Fn modifier for arrows was too much. I have to say, I found the Kinesis Advantage to be fantastic. It really did work, solving my ergonomic problems, wonderfully and very quickly. The need for it did depend on the volume of typing -- back when I used it, I switched off of it, but then had to switch back after some days with more typing.