Yup, that's where they are located. Here's a FAQ from their website to help out anyone that wants to visit them:
Do you have a retail store or are you strictly an online mail-order business?
At this time we do not have a location, but we are seeking a new Milwaukee location for a larger warehouse and retail outlet due to high demand from our customers (as well as our ever-decreasing space in our current location!) When we have a retail location, (or at the least, a new warehouse) we will be sure to post information on our site. At this time, if you are in our area and wish to shop in our warehouse you can call us at (414) 607-1953 or email us to make an appointment - we are very open to visitors and love to have people stop in when they are able! Our hours that we are around do vary but we can open the warehouse anywhere from 10 AM to 8 PM, so call us to discuss a visit!