Because of this video, I bought an 8 string, but when I use it with my AF2, I don't sound anything like as good as Javier in this video. Maybe there's something wrong with the guitar ;-)
Seriously, It's very interesting to play, but I've tuned the bottom 2 strings to G, B rather than F#, B, since I have no intention of using power chords down there, and to me the G works better with the way my brain is already wired up
I thought the neck might be too wide, but found the string spacing quite narrow. I can still use my thumb on the bottom string.
Great fun if you like to fingerpick your electric sometimes. 8 Strings go quite cheap used since most people are scared of them. Also, the more metally amongst us tend to dislike the EMG 808s found on most good 8 strings, but they are excellent into the AF2, so you can get a bargain.