does anywone use it? if so, it'd like to hear what you think, and your feedback, especially if you are a programmer and use vim or emacs on the text console.
I use a similar keyboard, the NightFox by Input Club, 65% (the difference is that includes arrows and PrintScreen, Delete, Page Up and Page Down) in terms of layout.
It's exactly as a normal keyboard but without the extra line of F keys (available in the second layer, with 8 layers to program with different functions, changeable with FN and number).
Compared with this one that includes the trackpoint and I suppose that the buttons under the space bar is for left, change to scroll and right click right? Also the backspace is on the number row, as a normal keyboard. In the Nightfox is like the HHKB, in the QWERTY Row, so it may need some training to get it right.
I can't give feedback in terms of the use of the trackpoint and the scroll, but I love the 65% layout in terms of extra space available. My next step will be a trackball (and learn how to use one) and I can even have more space available for other stuff. Also a mechanical keyboard helps to type faster, specially if the keys are tactile, were you don't need to bottom out the key like in membrane keyboards, just press enough until you feel the tactile bump, and you can move your finger to the next key knowing it activate it.
If I was to pay US$300 for a keyboard it'd better be using telepathy to read my mind and type stuff for me. 
Seriously, I can't see the point on a higher investment than a good rubber dome keyboard. Mine lasts at least 10 years without a hitch (I'm using a A4Tech G600 ATM). I've tried a mechanic keyboard before and couldn't see what's all the fuss around it is about, and sold it a couple months later.
If you're looking into models with macros there are options that costs a fraction of that price.
Or a Topre, or as I call High Class Rubber Dome (and I open the can of worms with Topre Fans).
Mate, once you use a mechanical you don't go back. Mine costs near US$200, but I saw keyboards in the order of US$500 and even more. It's a hobby as many others, with quality products and normal products. Just like Automatic watches, you have Seiko's and Citizen's and even other brands who use SII Movement (Seiko) or Miyota Movement (Citizen) in the lower end (and High End) and brands like Hublot and Patek Philippe who costs thousands.
Some people are happy with the Casio F-91W, other prefer an Omega Seamaster.