I haven't but I do know people that have. Good prices and good service even to canada. If you are canadian also check out

www.bikecanada.com (out of ontario, good service but prices tend to be high)
www.bikeroom.com (www.airbomb.com 's sister company. These guys rule I order from them weekly)
www.unbeatablebikes.com (somewhere in the interior of bc, sometimes has awesome prices but never updates his site)
www.unrealcycles.com (Ben kicks ass and he is out of Seattle, backs his product up)
Cheers