We've been using the Ooma Telo for more than two months. Initially, I encountered several garbled calls, but it has been rock solid for many weeks. We are quite pleased with their VoIP telephone service. We are definitely pleased saving $25 per month over our old Telus phone line. I cannot venture a guess as to how many robocalls were automatically blocked for us during the recent BC election campaigns.
A few moments ago, I looked over at the device and the always blue LED wasn't. The Telo was blinking red and I panicked. My wifi was fine when I noticed the little disruption. It lasted only a minute or so. Red indicates it has lost contact with its server. I suspect it also occurs when the firmware is updating. The dial tone returned after being offline for less the length of a normal phone call.