The Czech Pilsner Urquell is considered the best beer in the world by many experts, and I agree very much with them. But then again taste is individual. So I suggest you go out and try one for yourself. But if you're used to "thin" beer like budweiser you will probably think it tastes of too much, the same problem with wines: high quality wine tastes of too much to the untrained tongue.
The brewery also claim that Urquell is the first pilsner on earth, they might be right, after all the region in the Czech republic where it is brewed, is called plzen.