We have eaten at several.
More one stars than I can probably recall, but I believe only two two stars.
Yes, we have greatly enjoyed all of them - some have been the most memorable meals of our lives. They are clearly indulgences, and in choosing restaurants it's vital to look at the menu and make sure it speaks to you. Don't just go to a highly rated place if it's not the kind of food you enjoy or if you are not an adventurous eater.
Going to a Michelin star restaurant affords you the opportunity to try the best version of something. You will know whether you like it or not, no doubt that it wasn't prepared well.
One quick note - there are amazing restaurants everywhere, but Michelin stars are only given to places in cities in which there is a Michelin Guide. So, for example, there are some great places in Boston, but no Michelin star restaurants because there's no guide yet.
New York City (where almost all of our Michelin star experience is), FLA (we had a two-star experience in Miami), DC, as well as CA and IL have Guides in the US at present.