Summary: If you use an iPod (any model), than this is a 'slip it into the cradle... and it plays where you left off' item. As with all of the Sonos items, it is a no-brainer to use or set up. Expensive, but as with Sonos.... it reflects the motto, 'you get what you pay for.
Summary: If your goal is to stream audio from an iPod using the old 30-pin dock connector to your Sonos speakers, this is the way to do it. I use it with a 6th-gen iPod Nano. It locks up every once in a while, but all you have to do to fix that is reset the iPod by holding down the sleep/wake button and the volume down button for a few seconds. Put it right by your front door and you'll be able to transition between headphones and Sonos almost seamlessly.
Summary: Sonos is pricey, but you can't beat it for a wireless sound system that just works. Easy to set up, easy to use. Had a problem connecting to my computer once, and their tech support took care of it. It's taken me a couple years, but I now have Sonos speakers all over my house and I love them.
Summary: Simple to set up with sonos 5 and and bridge. Installed software on my PC and downloaded controller app for my Galaxy S3. The whole took 30 minutes and I was playing the Ipod or Pandora wirelessly in my living room or the entire music collection on my PC.