The very best ergonomic keyboards all share some common characteristics, such as split keyboards, built-in tenting, and key arrangements to minimise finger and wrist stress. They're typically also very expensive as they're custom-made, low-volume sellers for a niche market. But when the Dygma Defy demands an asking price of $609 for a fully-equipped model, expectations are inevitably going to be extremely high.
I try not to have preconceptions when reviewing a new piece of hardware but it's hard to ignore the Defy's full price tag.