Hmmm.. I've owned several IBM boards over the years.
The best, IMO, is their "Rapid Response" series. These are the traditional IBM "built like a tank" keyboards that look and feel very nice. The keys are very solid and the overall build quaility is excellent.
This model, however, is their "Active Response" model. I've owned this model as well, and was not impessed. It was very flimsy (flexed back and forth), keys felt cheap and soft...in short, not what I've come to expect from an IBM board.