I got the cd-i, maybe 10 yrs back. It isn't as bad as people think, it has such a bad rep.
If nothing else, it is very interesting in the software released for it. I got my hands on a sweet portable cd-i unit that unfortunately stopped working last year (recap project)
It's been a while since I have played it, but I remember enjoying burn cycle, and the 7th guest, as well as Hotel Mario.
The voice acting and FMV is just hilarious in the Zelda games, worth a play.
Attached is a pic of a few games with slip covers in decent condition for your enjoyment!