Here's my opinion of Brett as pertains to his playing with Creed - pretty damn good. I've seen Creed both with and without Brian Marshall, and there's an obvious difference, but I think Brett did an excellent job jumping in and covering the bass lines. Of course, I'd much rather have seen Brian playing than Brett, but since that's not possible... I don't know too many musicians who could play guitar and sing for a full set with his own band, rest a set, and then play another nice long set on bass (and some backup vocals) with a band not his own. And I remember the first time I saw him play with Creed, I was quite impressed by how quickly he'd learned all the bass lines. Perhaps he (or the band) were having a rough night at the concert you went to, but the three times I've seen him perform with Creed, I've had no complaints (other than that he's there instead of Brian). (Though I'll also state that I personally wasn't hugely impressed with Virgos - not bad music or anything, just nothing that struck me as standing out especially).