I've had one for a little over a week now and I love it. $10/mo for phone service, and the device and options are just really easy to use. Little expensive to buy up front but the monthly savings are big even over Vonage. Check it out if you've never heard of it.
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If you're interested send me a PM. I have 5 referral codes that will save you some money. I think you get a free wireless adapter or something... I don't know the exact details.