I think the wheel is wonderful, because I seem to have lots of good luck with it. I have NEVER got the rock, I have only gotten the bird thingy (too lazy to spell) twice, I got a lotto ticket twice, I won 5000nps once and I won a bunch of furniture.
I always get frustrated when I have the wheel running in a separate window for 2+ hours and for some reason my browser/computer/whatever gets an error and shuts down. All that waiting for nothing!
But I still play it everyday even through all the stress it causes. [No doubt it'll cause a heart attack or stroke one of these days for someone though... ]