Probably not what anyone opening thread would expect but a great service!
Ordered something last Sunday at pm from eBay in US and arrived today (Saturday). No messing about waiting for something stuck in customs here as is often the case.
Yes, used it for both buying and selling. Never had any issues and as you mention, purchases seem to be processed through the system quite quickly.
Just sent one of my vintage RC cars to the US and it was there within five days.