I actually OWN a Bigha (so far 80 miles on it in the first three weeks). Bad back put me in one. The bike itself is superbly put together - great welds, metal thickness - engineer biker friend told me it's overbuilt.
THE SEAT is incredible. Unlike the hammock type seats of most "bents" this one is like a small Lazy-Boy only more comfortable. It is also infinitely adustable for length, tilt, seat entension and seat tilt.
On the flats this heavy (52lbs.) bike feels light on it's feet and 15-19 mile cruising is easy. No problem going up long inclines (8-12mph), but going down the same incline hit 28-30 before fear took over. Steep hills do pose a problem but not many of those on my routes. You can shift into three modes - uphill, flat, and downhill while not moving and each mode has 9 speeds - total 27 gears. The disc brakes are superb and the electronics are high quality and accurate.
This is not the most maneuverable of bikes but I love it's solidity. Not worth the money? My friend bought a $3000 recumbent stationary bike - with mine I can see the world.