I just got my first PBR order last week and they rock! Sooo much cheaper than Marcos (especially since Marcos doesn't carry a lot of older stuff). They've got my business!
And honestly, never had any issue with the web site...maybe because I've been online since the dawn of the internet and ALL online shopping used to be like that, except sketchier...but I opened the FAQ and then went to town!
Truth of the matter is, you will inevitably order from each of the suppliers eventually if you stay in this hobby long enough, not one of them has everything...although PBR is close!