Check the "Ammunition Review" tacked at the top of the forum - there is a S&B section there. I have tried it myself and I have found it to be reliable and acceptably accurate. I have also heard the soft brass comments, but it's never been an issue for me. I have only put 150-200 rounds through it, not exactly a large sample from which to draw concluions.
You should consider though, that they use steel jackets in their 55gr "M-193" type rounds. The jacket is about the same color as the brass - it's a thin coating to protect the steel jacket from corrosion, and to protect the barrel from the jacket. The steel jacket isn't a real big deal, but it will prevent it from fragmenting, so it's not a good home defence/SHTF round. I don't know if they use steel jackets in their M-855 rounds. Normally I would say to check it with a magnet, but the steel core of the M-855 will also stick regardless of the jacket material.
-K