Is it an MMS2, or an MMS2A? The MMS2A is slightly better internally and is rack mountable, but I've still had a few issues with steaming on a few that we have in the wild. Most times a firmware update will fix it but sometimes the database gets corrupted and you'll need Autonomics support to delete it to fix, (under the hood, it's really just a windows computer). Recently I've been having airplay issues with the newest fw on the 2A's. We don't use Pandora much as I'm up in Canada, but on occasion I'll use a client's US Pandora account with a DNS forwarder and in those cases I haven't had issues other the database problem..