I've played one in the dim and distant past. To the best of my recollection, it hung a little oddly at first (inveterate Fender-itis on my part, possibly), but after a little footering, it was supremely comfortable and played really, really nicely. Pickups weren't stunning, but everything worked rather well. The one I played had Sperzel locking heads, so I can't comment on stock tuning stability. Fretting was pretty decent, neither breathtakingly good nor offensively bad, and it rang true right down the neck. The Headstock doesn't seem to have that "Three miles long obstruction that will hit everything within your line of sight" thing we all know and love from the Firebird, and the wee raised rail bit down the middle is more subtle, too.
All in all, it was a sight nicer than any Firebird I'd played, and if the volume controls weren't situated in the next townland to my picking hand, I'd have dropped coin on it.