Have you seen one in person? I have. First time I looked at it, I thought "Oh, awesome, big analog sticks! Wait, how am I supposed to use the buttons in the middle of a firefight with that huge range of motion?" They weren't very well thought out, especially if you're going to be playing any dual-analog games. To hell with Crackberry-induced carpal-tunnel syndrome, the Quasi sticks will cripple your hands for life.
If you could get their setup cheap enough, it'd be almost worth removing the guts and pots from the setup and interfacing them to analog trigger sticks. At least then, you could use the buttons.