I bought two of these, one for my Wii and one for for my laptop to backup my accounts. No problems at all, both machines accepted them without any fuss.
This SD card is NOT COMPATIBLE with the Wii which can only 'see' SD cards 2gb and below. Edit: Apparently there is a way to trick the Wii into accepting a higher capacity card. Good Luck
This arrived within 2 days and went straight into the Wii. Downloading is now much faster and the kids are really pleased with the bits we've downloaded so far. Price was best I found on amazon so really pleased