Cavaets of Teleporting

Teleporting.  One of the most awesome superpowers.  The ability to make yourself spontaneously change locations.

If i could have any superpower, it would probably be this one.  going to be late for school?  boom.  not anymore.  want to stand on that tall structure that is impossible and probably illegal to climb?  no longer.  don't have the resources to go travelling around the world every night?  faced with a supervillan?  as you can see, problems disappear as fast as you do when you teleport.  but perhaps teleporting isn't as perfect as one would think.