I have be develop software use this keyboard for 8 year , and I can not work without it now . some of the key take more time to get use to -lrb- the arrow and bracket -rrb- but after a few week , I have no problem . before I get this keyboard I be have frequent wrist pain . since buy my first Kinesis contour keyboard I have not have a single twinge of pain . it may well have save my career . I now own three of they , and I have have no issue with the build quality . I just wish they be cheaper !