I haven't played one for years - I know there's one in the house somewhere, but I don't like it in comparison to a good wooden instrument. The main point is that they were very good for amplified stage work, they don't feed back and the internal electronics are good. There's more competition in this market these days, but in the seventies there was nothing as good "off the peg" - you had to "Hot-Dot" a Martin to get close. I don't play mine because I've not done that sort of gigging for twenty years. I think the difficulty is that because that round back projects so well, the player does not know how good the guitar sounds without foldback.