Changing the heads with better ones it's very good. Not sure how to classify "Sound" - out-of-the-box is not so good, but it can sound much better with other heads. Upgrading also the lugs and tension rods would be perfect, but, current price does not allow perfect quality control and those mentioned improvements, I think.
Shell Finish is excellent for this level and sounds "fuller" and more captivating, engaging, than some alternatives. If the idea is to use it as it is, out-of-the-box, in my opinion, at least the reso should be replaced, or both reso and batter, if possible. The shell, itself, seems to be very good.