Don't forget that it is 11 times less dense (as a liquid) than plain old gasoline. It delivers 3 times as much energy per pound but that still leaves you 11/3 = 3.6 times LESS efficient (volumetrically) than gas. In other words, for the same range your fuel tank must be almost 4 times larger.
If you try to use compressed hydrogen gas, it becomes even more absurd.
--Boris