Since practicing law involves the ability to write well and voluminously, I'd say the essay is pretty important. If you can't write, you have no business being a lawyer. Believe me, you're going to have to prove your ability to write a lot in law school. Of course, the LSAT, GPA, and recommendations carry a lot of weight too.
Me <- went to law school.
BTW, if the message you posted to start this thread is any indication, you really need to practice your writing skills. I don't mean to be harsh, but if that's how you normally write, you've chosen the wrong profession, my friend.