It's a guitar that is essentially two 'bad' Tele rhythm pickups. It turns out that neither the stock Epiphone pickups nor some Artec replacements are nickel silver, both causes steep attenuations of treble, and the guitar is a lot darker than I would like. But I bought one anyway, because some high profile musicians have made use of Epiphone Casino's over the years.
I was really on the fence about it because I find P-90s a bit too dark to begin with, having an inductance that puts them in the category of 'high output' pickups, and on top of that, metal covers which almost certainly weren't nickel silver. I bought an Epiphone Casino a few months ago.
