I purchased this product a week ago and recently set it up and it works perfectly. It's been running for a total of two days since I last set it up. I will update this review in a few months after its run for a while.
My goal was to get an alternative/replacement to Skype which was my replacement for Vonage -- I no longer use landlines & totally committed to VOIP. I was tired of paying extra costs associated with telephony services thus this option. This has turned out to be a pleasant surprise.
The people at OBi110 have perfected KISS principles, it was so easy to setup Google voice, actually much easier than setting up Google voice settings options in Gmail.
Pros. - Free VOIP at least when connected to Google Voice for now. - The installation is very simple my setup is a little different from the manuals recommendation, since this is connected to my power Ethernet adapter due to proximity of my phone but it still worked on the first try. - Simple admin UI that is easy to use and understand. - Just works perfectly. - It's super small.
Con - Next version should possibly have an automated firmware update check. It is currently a manual process.
This is the perfect alternative for services like Vonage and better, at least for now calling to the US and Canada is free using Google voice. I highly recommend this product.