If you are looking at premium brands, significantly more perhaps; lots of people are frugal enough that even if they are going to try more than one, they'd like to narrow the selection down before doing so -- and even decide whether or not its worth buying any at their regular store, or whether they need to try elsewhere.
If you're looking for a premium brand, a small window is not going to help you much. I don't know how good your sight is, but mine doesn't allow me to bake it and taste it through the plastic ;) and if you're into premium brands, the sight won't be your defining factor.
