I purchased the gig bag along with the MB200 and it is perfect for a lightweight way to travel. Fits just right inside, with another pocket for the power cable or any other leads you would need with it. I'd recommend it if you plan on buying the MB200 head!
This is really a very nice little bag. Great for keeping your Gallien Krueger MB 200 safe and protected while on the way to gigs for storing at home when not being used. Comfortable to wear and looks nice with the GK logo on!