We all know of bricklink.com, the long standing go-to online LEGO marketplace. However, I personally find the site to be aesthetically outdated and the payment systems more then a bit of a hassle (though this may change soon).
On the other hand, Brick Owl is a newer service of the same type. Has anyone used it? How does it stack up (no pun intended) against the venerated BrickLink? Do any of you have a preference?