A Basic Humidor Buying Guide

i bought my first humidor the other day, i thought i would go with a 20 capacity, but everyone says buy more than what you think you will need so i got the 50 capacity with a glasstop because i know i would always be opening the lid to look inside haha, what do you guys think of this one as far as a beginner goes?
http://www.cigarsinternational.com/p...text=whitetail