I have been riding a four inch squishy for 3 years then I bit the 29er hook and picked up the Jabberwocky. I really wanted something different than what I have been riding. I pieced the bike together with all the parts that I really wanted and I could not be happier with how it turned out.
The steel frame in absolutely gorgeous and the ODIS fork is super stiff. On my first ride I could not believe how well this bike could handle the singletrack here in Marquette, also how amazingly this frame can accelerate on the flats and going up hill, I feel like Contador (pre-doper) when I rocket up hills passing all my riding buddies. My second ride on the bike was the Ore-to-Shore epic here in Marquette(if you havent done this race do it!) and I was amazed again by how well it accelerated and handled the trails.
I also could not be happier with the single speed setup I have on this bike, 34/16. The brakes are a wonderful addition, as is the carbon bar taking away some of the vibration.
The bike is fantastic as a rigid, however if you ride some really brutal single track I would recommend throwing some squish in the front.
So bottom line, if you want to try a single speed 29er, buy this bike! You won't be disappointed. If you ride smooth XC ride the rigid, if you do some rocky Single track get some squish. Have fun and go ride!