As long as you don't expect power, you'll love it
A local bike mag tested one back in ... 1998 or 1999
They were called Volty here.
http://www.motorbikes.be/en/Suzuki_Volty_2000.aspx
That's right, it's been around since then, and that's what the X originally referred to, 1999 in Suzuki year-coding.
Back then, it used a carburetor, and returned under 3 L/100km or over 78 mpg, even in the hands of bike journalists !
It should do nothing worse than minor miracles in its current EFI form and in the hands of a hypermiler.
Back in the day, we even had it's little sister, the TU125 :
http://www.motorbikes.be/en/Suzuki_TU_125_X_2000.aspx