I don't see how c4u is a good choice for shipping since c4u is in China...
....because Rubiks.com is expensive product, the same shipping price (or close) and has a very limited supply of products. Shipping from China took 5 days longer for me and was much cheaper and I got the products I wanted instead of crappy Rubiks 2x2, 4x4 and 5x5's and they don't carry megaminx/square-one type cubes at all.
Dude, Rubik's.com DIYs > C4Y cubes.
Most people will disagree, but if you know how to tension a Rubik's.com DIY it can be SO MUCH BETTER.
C4Y cubes have the edge caps, though... ><