Im getting very close to having enough cabbage saved for the purchase of Nikon D200. Along with that camera purchase, Im also considering buying the MB-D200 battery pack. Am not very much concerned about the added battery life this accessory offers, but the vertical shutter release might be handy. Question for the membership Is a vertical shutter release all its cracked up to be? Is this option worth an additional 170 clams (B&H price)?