My experiences of Michelin * star restaurants have generally been good. The best meal of my life I ate at the 1* restaurant Evo in Barcelona:http://www.tripadvisor.com/ShowUserR...Catalonia.html

And while I generally find Michelin * restaurants to provide excellent food and service the cost can sometimes become incredibly disproportionate. I would say fine dining follows an exponential curve. At the higher levels you will simply have to put in a lot of $$ to get discernable better experience, the differences in quality can simply be subliminal.