Overall, I find the Epiphone Thunderbird to be a decent practice bass for jam sessions or performing in smaller venues, my only gripes with it are the lack of inlays, and perhaps a slightly muddier tone than I'm used to.
I love this bass. I have beat the hell out of it. Pun intended. Somehow, it still sounds great. I'm not a bass aficionado, I wouldn't even say I'm a bass player. But I do play on my own songs, and I am comfortable with saying that this is a great bass for studio use.