I got the SDHC version (I KNOW ITS MADE BY ANOTHER MANUFACTURER!), it works prefect, no issues with hardware and I've had it for a month. So really most alternated R4 products shouldn't kill (well, I dunno! SDHC version is okay anyway)
I just recently bought the same one. It should be "R4-III", and not "R4-3". The site printed on my box is "r4dsl.net". Firmware kernel's up to v3.08, and I've had no problems with it so far (*knock on wood*).