I have not tried eel, as far as I know, but given my general dislike of eating animals aquatic, there is a good chance I would not like it. That said, it would very much depend on how it is done.
I am wondering if jellied eels would be "Unagi Zerī" in Japanese, or perhaps they use "Jam" and it'd be "Unagi Jamu." Just don't get in a jam confusing unagi and usagi. Two very different animals!