This is also true for other devices, such as digicam, PDA usw..Sind this not SDHC-compatible is only ever not recognize the card.
Incidentally, each SD memory card larger than 2 GB necessarily an SDHC card! Therefore, an indication in the (usually bad) documentation of the device on the support of SD cards up to 8 or 16 GB should be seen as an indication of the SDHC compatibility.
The Speedclaas 2, corresponding to 2 Mbytes / second, could for some applications, be too little, for example, HD video cameras, or continuous shooting with "megapixel monsters". Therefore only 4 points.
Otherwise, I could not detect any problems.