The compatibility with all cards used by me is so far 100%! That means I have not found a map that is not working. Also relatively new SDHC cards with 16GB (Class 6 Transcend) and microSD cards of various sizes (2, 4 and 8GB) and manufacturer (Sandisk, Transcend) all work.
The speed is great, especially with the CF card: here also the UDMA mode in accordance with the appropriate card is inserted thanks to the chipset (UT335) (I especially Transcend cards) used what enormous speed increase guaranteed.
The processing of the case makes a high impression.
All in all I'm very happy with the part and I'm still surprised at how high quality can be such an inexpensive product.