Actually I did use one and I clearly recall that for that time it was really quite good. The games were simple, aye. But you're forgetting that the games you could get were made by Philips itself, who wasn't -and never has been- a game developer like Nintendo. It died before major developers could get the most out of the box.
Your remark about the input being weak falls short because it had virtually the same controller as the SNES. Storage capacity is also a moot point because the SNES didn't have any capacity either and im fairly sure you can put more on a CD than on a SNES cartridge. On the cost note, it was probably more expensive for US citizens than for us in the Netherlands. Philips being a Dutch brand and all.
And that little snide at the end: "Philips, cm'on" really doesn't make any sense at all. I don't know why you're railing the way you are, because clearly you've never actually played with a CD-I.