I agree, that overall.. it's definitely the cheapest we've found. We're in the same boat you are, we're purchasing for offices and plan to use the system for internal communications between all of our offices throughout the US.
We've had pretty good luck, we've purchased the MediaBOXes and have been using their cloud system to power the content.
Unfortunately, we purchased the server because we want our information to remain private....but we've had nothing but problems trying to install and set it up. We've spoken to the live chat support (which sometimes is quite helpful, and other times... extremely frustrating. One example: I use a mac, and have had some compatibility issues even though they say everything is mac compatible.. and I've gotten answers like "use a PC". Really? That's the answer? No. I spent $2,500 on this mac, your software is stated to be mac compatible and this is what I'll be using. None of the tech guys seem to know a thing about Mac, which is surprising - since Mac is by far the leader when it comes to digital media.) They also love using Team Viewer... but our company restricts Team Viewer, so we need more options than just that for tech support.
Anyway - as I've said we've have problems with the Server... we pay for "Enterprise level support" - yet, we've called multiple times, left messages, and have never received a call back. Things like this are very upsetting - when they offer totally free options, yes... but we're choosing to pay them money... we should take some sort of priority.
Also - I agree with the previous reply that says they've been been kind of all over the place regarding upgrades, new system features, etc... which, when you're waiting for a specific feature to become available like we are, that has the power to become really aggravating.
We've been doing business with MS for the last few months. Although we've had hiccups here and there, we have had overall a positive experience, until recently with all of our server problems. I'm hoping they come through and help us... then my faith will be restored.
I say they're worth a shot, but try out their free system first before investing a lot of money to ensure this is what you want.