I bought it during lifetime promotion, I think it was when celo.net was just started in the business. At first, I found many troubles connecting to their servers but eventually, things are getting better and today it is so easy to connect. What amazed me was when I check for a leak, they really cover it nicely. Makes me feel safe in surfing the grey and dark area. Good job for the celo.net team.
I got to know Celo through their lifetime promotion. I have used the service for 4 years and it has been great for me so far. I haven't experienced any downtime. The speed is not super great but good enough for me to stream 4k videos. Highly recommended.
They almost don't have their own VPN client application, yes there is, but weak. But the real strength comes out from their supported protocols. Celo.net offers industry standard OpenVPNs, IKEv2. Plus, Obfuscated SSH, Shadowsocks, Wireguard supported. I've never seen any other VPN services provide these wide choice of protocols.