I did buy two of these :
(from china => 3+ weeks shipping)
I think they are refurbished ones, the cases are just so slightly different on each one... not sure though...
Copied (with dd on a Mac) the CF that comes with Spencer's CF board to them.
One for 'work' (hardware development, CP/M 'drivers'/bios), one for 'fun' (CP/M software testing and development).
They work reliably for about a month now (at maybe an hour/day on average).
That's somewhat short of a test to go all the way to recommend them, but...
Personally I'm happy with them... for the price... for now.