I don't know what has happened since that terrible review in 2018 but I have been a customer since October 2020 and have been very pleased.
I came to Ringfree after having used VoIP since 2008. First with Vocalocity and then when they were bought out by Vonage. My bills kept inching up and I finally started shopping around. Ringfree cut my bill by about 30% rignt out of the gate. So that is nice but one of my biggest frustrations with my previous provider was customer service. I think that is the thing I like the most about Ringfree is the outstanding customer service.
When I have had a call for technical support it has been resolved, via email or telephone by an extremely patient, locally based techie. Then, regardless of how small the problem or question, I get an email at the end of the week making sure all my problems have been resolved. So back to that review from 2018? It was either a troll or the company has really stepped up its game. I highly recommend.