I bought my engagement ring and wedding band for my wife here. I knew nothing about anything but was helped in a very professional manner, even when I just went in to take a look before I decided on anything.
They will even let you just walk in and have your jewelry cleaned, it only takes a couple of min.
I don't have and reason to be making a big jewelry purchase anytime soon (thank god). But if I ever need to again, this is the first place I'll stop in. Just so I can say, "I went to Jared."