Got mine in! Couldn't be happier! Looked up their handset which from what I read is a total steaming pile of failure, and their usb adapter so your cell can ring through the ooma... well after a little research I picked up one of these [Panasonic KX-TG7623B DECT 6.0 Link-to-Cell via Bluetooth Cordless Phone, Black, 3 Handsets] at Best Buy for about 90 bucks. These two items combined are a powerhouse! I've linked my iPhone and work cell to the Panasonic, so I can punch in a number, and hit call to use the ooma, or select either of the two cells to call out from. Paired them both. So from any of the handsets, I can call using my business cell, my iPhone, or my ooma number. Also, all calls that come in ring the Panasonic handsets as well, all with distinctive rings (ooma, iPhone, work cell). It pulled in all the contacts from my iPhone in a breeze. It also supports a wireless headset, which I'm about to test out and let you know how it goes. I was really shocked how simply and effortlessly getting this all set up was. I disabled voicemail on the ooma, and the iPhone, and use google voice's voicemail, which is more robust anyhow. Screw trying to get it all through ooma, use the panasonic and get more for less! Was gunna pick it up on amazon, but the cost was a difference of about 10 bucks, and I couldn't wait. I've told everyeone to start using my Google Voice number, which rings my ooma, and my iPhone. I dropped my minutes to the lowest, and texts from unlimited to 1k. Should cut off about 50 bucks a month from my AT&T bill. Get it. You won't be disappointed!
EDIT: I was thinking I'll update my voicemail for my iPhone to say, "if you've received this, please call my google voice number at xxx-xxx-xxxx. I'll hear through the distinctive ring their calling my iPhone directly, and not answer till they get my iPhone voicemail. If they call back with the google voice number, which will ring the iPhone as well, I'll pick up if I can; otherwise, the google voice voicemail will pick up. Makes getting people to change easy. In rough theory so far, but I just shot a bunch of texts saying new number, and it's basically done. I haven't tried all the permutations, but I did use one handset to call out from my work cell, to dial my iPhone, which rang the panasonic handset, which I picked up from another handset, and all worked well... they've really ironed the thing out... Pretty impressed.
Oh yeah, no activation fee, and I did set it up in front of the router... just for ease, at first.