Pre Health Comms are good, but at my school at least, it is kind of a bottle neck. You want to make sure that if you do a Committee letter you get on point right away to avoid any delay in processing your app. Also, make sure you get some killer LORs because Ive actually heard of Pre Health Comms writing people bunk letters that actually make you look bad. Why your own school would send a letter to screw you in the butthole I don't know, its kind of eff'd up.