The adapter installed easily and works perfect. Pairing my Verizon Droid 2 Global was flawless.
Unlike others, I have had no problem with latency or quality on incoming calls from my cell phone thus far.
The latency problem others face could be an interference issue. Bluetooth operates in the 2.4 GHz band. The same band that many cordless phones, baby monitors, wireless cameras, WiFi B & G routers (which are often next to the Ooma), Microwave ovens and many other devices operate in. It is a very crowded frequency.
I have Panasonic and a one Ooma phone that are all "DECT 6" phones. DECT 6 operates in the 1920 MHz-1930 MHz band in the US and Canada. My WiFi in 'N' only at 5 GHz. I rarely microwave and it's a new unit anyway.
Moving WiFi and other devices that work on the 2.4 GHz band far from the Ooma and your cell phone right next to it may help. Technically you can move the Ooma up to 328 feet away from your router with Cat 5 under perfect conditions. 100' should be a very safe length and more than most homes need.