We went to this Jos. A Bank to look for groomsmen suits. We knew the color scheme we wanted to we just needed to find a vest, pants, and a suit coat that matched. We've had friends give less than stellar reviews of this particular store, but since we didn't need that much help, we disregarded it.
We looked around for about 10 minutes before we were even greeted or spoken to and that's because I flagged down a gentleman. He told us to find the vest colors we wanted and he would find the matching pants. Once we picked out the vest, the gentleman was no where to be found. After waiting around for 5 minutes, a young guy saw my lost look and helped us find the matching pants. A little later I needed to find the matching suit and all the sales associate were busy or no where to be found. I waited around for a bit for someone to wrap up but then just tried to find it myself. Try finding a matching navy suit out of 300+ in the right style, fit, and size. We finally just tried on something to get a feel for his size and left. We'll just try to buy online.
Side Note - There was a gentleman trying on suits who had wider shoulders than his waist so he was going to buy a larger size suit and get it tailored. The tailor at the store told him that just tailoring the suit would never look perfect so he should just buy a custom suit as the price wouldn't be that different. The suit he was trying on was on sale for $249 whereas the custom suits were 2 for $1,000. It was a crazy up-sale and the gentleman seemed uncomfortable with it - as was I.
If you know you're size, buy online - save yourself the trip.