I too bought it off the wii channel, and have enjoyed playing this in between bouts of Big Brain Academy, and Wii Fit.
Definitely worth it for £10. More fun when you have 4 people playing, although it's often just the 2 of us, and we still have fun with it.
Can't compare it to the Buzz games on the PS2 etc, as they are the best quiz show games I have played. But not bad for the Wii.