I'll toss my hat in.
Been lurking here for 4 or 5 months. Finally bought my 3 tuner Moxi + 2 mates when the live TV feature was released.
I've been waiting years, literally years for someone to offer a legitimate whole house solution. Moxi delivers. Is it perfect? No. Is it the best whole house solution - yes, by a long shot....
actually, is there any real competition? - I don't think so.
I've been messing with HTPC's, media streamers, DLNA clients, video over LAN, etc for *years* trying to get decent delivery of centralized content to multiple TV's. Everything else has been clumsy, short-lived or both.
Until Now.
For those who are also lurking and undecided or concerned:
1) Moxi tech support is phenomenal just like everyone here says. I watched my Comcast installer call his fellow installers to rave at the concept of me bringing up a chat window and instantly getting a knowlegable rep. Oh gee, then the Moxi rep said "call me at this 800 number" and had the receptionist greet me by my first name when I called and direct me to his extension 30 seconds later. Crazy good. Like they're showing off!
2) Hard drives are pumped out so fast, under such great price demands that large batches of defectives are inevitable. I work in IT (as I'm sure many others here do), and I can't tell you how many drives of all makes and models I've seen fail in my lifetime. Hundreds for sure; I personally replace about 25 every year in all kinds of devices. Moxi cannot be blamed for failed drives - only their response. However, I would like to see the file system exposed for backup and expansion purposes. Alas, I do not have the low level skills to tackle this.
3) Comcast M-cards are no problem in the Moxi. The installer and activation people won't have a clue, but that doesn't matter. Just *insist* that the installer bring multiple M-cards. It seems these are rather finicky, and just like hard drives, have a high rate of failure

4) If you can't get past this statement "but my Tivo...." , then the Moxi probably isn't for you. Actually, there's probably nothing for you but a Tivo branded device, and that's okay. Really - you should buy what makes you happy.
5) Yes, you
can get good performance over a wireless network. For fun, I tested both the DVR and the Mates over 300mbps 802.11n and 54mbps 802.11g. Amazingly, even HD content streamed satisfactorally over the 54mbs connection for me. Obviously, it is not ideal, but can serve in a pinch. My master bedroom currently has a Mate connected via G for the last 4 weeks; excellent performance. FWIW, I use DD-WRT wlan devices in client bridge mode. Like everything else, your experience will be a direct result of network planning and implementation. If you don't really understand ethernet, you will likely have poor performance with wireless.
Everyone should have good quality cat5 or better running to each unit when possible. Everything else (including MoCA and Powerline) is a compromise or an experiment (like me).
6) I have no clue why some people are convinced that the 2 tuner units are superior to the 3 tuner unit. I've read and reread the posts, and still can't work it out in my head. You'd have to pry that extra tuner out of my cold,de.... uhhhhhhhhhhhh - you get the idea.
7) Everyone has their own experiences, but it's clear to me that the Moxi DVR is pretty well tuned and responsive assuming you don't have local cable provider/M-card issues. It is somewhat relative to the rich visual presentation. You can't get something for nothing. That's an Isaac Newton thing, right?
What's undoubtedly true is that the Mates are still in their developmental infancy with respect to live streams and interaction with the DVR. I'm banking on optimization and enhancements in the near future. If this never happens, it will be disappointing, like potential unfulfilled - but not something that would make me mad. The system would still be delivering something I cannot get from any other platform.
8)
BIG FUTURE BONUSES - can and will Arris deliver bigtime content natively like Netflix, Hulu, Vudu? Wouldn't it be great? I'm only 50/50 (at best) on this prospect. Is the money there for it? The market for $500-$1000 TV watching devices can't be very big, and Tivo and the Cable providers clearly have the bulk of the market... without the recurring revenue ala Tivo, Moxi is economically disadvantaged (bless their hearts) - But, its what makes watching this thing develop fun and interesting.
9) Am I a Moxi schill? No............ I hate the Moxi button (on the remote), I hate the freaking out of the Mate when I unintentionally hit a VOD channel, I hate the Mate's lack of a grid guide, record initiate, record delete, I hate the proprietary file system, blah, blah, blah.
It's still the best thing since sliced bread or broadband internet.
And my wife loves it. Good riddance, single room Comcast Motorola HD DVR. Go lock up in someone else's living room.
FIN