The Sidney's are def. printable, just crappy lol. The ink stays on it (ages to dry), the only complaint i have is i can't get high quality pics on it. The black ink is also smudgy when under light. The printable Princo's are matte surface, so the image quality isn't great. I like the Ridata printables (not sure which model they are), because i've seen the result and it looks good (not like original but far closer then matte). I wouldn't know what the official name for discs like this is, i had to just touch the discs until i found a smooth one.
I've read the article about the TDK's and i'd get them if they were available near me, they sound kewl. Has anyone personally had experience with printing on "Ridata Printables" (non-matte) finish???
Also, it wouldn't be because of my printer that im not getting good dvd disc prints? (Canon Pixma IP5000)