This is for anyone who is planning on buying a Connect! I hope to also cover concerns that you have that I also had before I bought one!
I am posting this on Sonos's official website because I have LOTS of good to say about my experience! Why would I post something negative about Sonos here? (this doesn't mean I am biased ;p)
It's gr8 and I now use them as my desktop speakers. My Sonos is now WAY more versatile than normal speakers and input delay isn't an issue even though it working through your WiFi.
What made me buy a Sonos Connect? Was there any input delay? Was the delay significant in gaming and other applications? Was it easy to setup? I'll answer all of these!
First off, I chose to buy a Connect due to the lack of inputs available for my two Sonos Play 1's. I loved the build quality and sound these speakers produced, and found the only way to get a line in was to buy a Sonos Connect. Even though the whole setup cost me almost £600, it was worth it!
Easy! All I did was use the 3.5mm to RCA adapter supplied in the packaging to send my analog audio from my computer to the Connect, which then uses the WiFi to send the audio to the speakers. I am now happily using my dual Sonos speakers as my desktop speakers now. In regards to how to set it up in the app, just add a player and during the process select the Connect setup. When done, link up whatever grouped speakers you want to your Connect.
Do note that there is an Optical and COAX port, though they're outputs NOT inputs.
They say the input lag from the Connect is around 70 ms in uncompressed mode (a couple of seconds of delay is added when compressed mode is enabled so I highly discourage this for desktop use) which is probably correct. However, using the Connect myself I can barely tell the difference... The ONLY time I can see a/v sync issues is when playing an audio intensive game like Osu! as that requires precise timing in both audio feedback and input from the mouse/graphics tablet. In FPS games like CoD, I can't tell... You'd think that the fact I am shooting a fast firing automatic weapon would make the a/v sync pop out like a sore thumb but it actually didn't! I was really impressed honestly. Other games I like Rocket League sound AMAZING and Skyrim sounded awesome with the orchestral music.
I did get an issue where the audio would drop out for a split second, then re-connect straight after... But that fixed itself and I never get that issue anymore for some weird reason? If it persists in the future I will get in touch with Sonos. It's also worth noting that when I got that issue, the forums was FLOODED with the same issues so it's probably a blip.
I recommend the Sonos Connect if you plan to accompany it with an existing Sonos system. If you want to have the ability to connect any device via line in to your speakers this is up your street. Even gaming, speaking to friends with VoIP, YouTube, and the desktop app of Spotify I have had the great pleasure of using. I now see my dual Sonos Play 1's as really versatile speakers due to the fact that I can control them wirelessly to play whatever music I want, and use my PC with it too. I have even found a double ended RCA cable with a line out output meaning that I can plug whatever device into the Connect ALONGSIDE my PC for a double input. So I can play music from my Phone, and use them as desktop speakers at the same time. It even acts as an audio output too so I can listen to my Sonos speakers with my headphones connected (i'd never do that but you get the point).
I recommend getting one if you plan to add more functionality to your Sonos.