Great concept! It's basically a wine bar and retail wine store combined. Excellent wine selection, great tapas style appetizers and generally a cool place to hang out. You can walk in and buy your wine at reasonable retail pricing and take it to go. However, if you wish to enjoy your wine there it's only a $5 corkage fee, which is considerably less expensive than a typical bar/restaurant mark up.
I cannot stress enough the quality of selection. This is not grocery store wine. Nothing like this in Burlington. I highly recommend Cork & Cow.