We've used the MMS-2 and MMS-5 on every project. It's interesting because when we did AMX we basically abandoned the MMS because the AMX module is garbage. The MMS/Crestron integration is bulletproof. It's a native Crestron device that use the Media Player Smart Graphic. Kind of a no-brainer. The MMS-1e is exciting because now we can have true independent sources per user with independent streaming service accounts.

The Sonos is a good alternative if your client only uses streaming services and their listening habits allow them to fit their music selection into 20 favorites.