My 2001 Terrashark has been a GREAT ride.  I've had well over 1,000 miles of single track fun on this bike and it's still going strong.  Worst problem was worn out seats for the rear axel.  Needed to replace the swing arm.  Most of my riding is in the US Pacific Nortwest in Washington State on the Olympic Peninsula, but the photo is taken in Moab, Utah.  Riding the slick rock is amazing, but it literally tore off the knobs from the Continental tires that came with the bike.  The photo is at the end of the AWESOME Porupine Rim trail.  It's about 32 miles long with the first 12 or so miles climbing thousands of feet - a fair amount techical to the Rim at 6,800 ft where you get an inspiring view of Castle Valley far below.  The remainder of the route gets really hairy with foot wide single track next to vertical rock wall on the left and a 1,000 foot shear on the right.  I walked that part!