If you’re on the fence about upgrading to S2, my humble advice to you: DON’T do it! Not a mature platform.
It’s slow, buggy, unstable, and should never have been released in in the condition it is in. It has transformed me from a huge Sonos fan to having zero faith and appreciation for the technology.
Oh, and by the way, there really is NO additional value over S1. So there’s ZERO reason to make that move--stick with the mature option and adopt in a year or two when S2 sucks a little less--hoping that day comes sooner.