The knowledgeably of their staff took a nose dive when they dropped commissioned sales people.
Its like damned if you do, damned if you don't. Commissioned people have extra incentive to help you buy whats right for you (so its not returned on them, making them lose their sales commission and the potential for repeat and referral sales), make sure you leave with everything you need (so you don't have to come back for a cord), and follow up with you and make sure you're happy. Example, my friend bought a bluray player at Walmart last night, asked if she needed anything else for it, they said no, then she got home and couldnt use it because she didn't have an hdmi cable.
On the flip side, anyone who knows what they want (which is a growing percentage of the population) is completely put off by salespeople and hate the hassle.
Still, you'd be amazed how many people go looking to spend hundreds of dollars on a camera or thousands on a tv set up and are 110% clueless about what they're buying.