i have a moustache bar on my 1990's bridgestone cb0 zipp city bike. i love em. i've toured across the country twice on that bike. they offer several different hand positions, all the advatages of a drop bar or flat bar. i have mine set up with dia-compe road brake levers with suntour ratchet bar ends.
there is a decent knock-off bar available now, it's the "tiki bar", it has the same width and angles has the nitto. it's made by origin-8. i think they retail for arround $28 +/-. i recieved some for demo but have not installed them on anything yet. i'll probably put them on my single speed townie. i have a schwinn varsity converted to use an english b.b., it makes a bomb proof arround single speed/fixie.