The one (I only tried one) I personally played sounded very, very flat, like it was all midrange with no crispness of treble or depth to the bass. If you found one that sounds good to you, go for it! My personal experience that the low-end Martins are a hit or miss thing; some sound amazing (some of the D-15s, which are all "real" wood, have a remarkable depth of sound) and some do not.

I think the composite nature of these guitar you're talking about makes them wonderful as a "beater" or road guitar, in that you don't have to handle them with kid gloves. (kinda like my ovation piece of poop that I haul along to places I don't want to take the Taylors!)

Only thing would be it won't improve in sound over time like an all solid wood instrument. And we're right back to, if you like the way it sounds, buy it! The price is certainly right, and being a Martin, it will always have some resale value when you want to trade or if you tire of it.

jim