I've tried them in the Wii. I didn't like how it felt at all when the autofeed mechanism pulled the disc. I would not recommend using these things in anything else but a system/device with a tray. The orange rim makes the discs wider. I wouldn't trust these tings anymore than I would trust the stick on labels (I use printable discs myself).
I have an entire spindle of these things, I won't use. I have to dig them up. If anyone wants them, you can have em. Just pay me shipping ($4 or so?). First PM can have them if want.
Besides, these don't fit on my external hard drive, so no use for my Wii.