I agree with jekel...making your statement poignant may be a great advantage although it is certainly more difficult for most. I revamped mine many times (obsessively?) and got it down to < 300 words. To tell you the truth, I found this to be an challenging exercise that really helped me scrutinize my thoughts, feelings, and motives for medicine. I really got wrapped up in the whole process... I also tried to keep in mind that the people screening my essay have seen perhaps hundreds of these things, therefore, I thought "short and sweet" would be refreshing. Good luck!