The functionality is very good for a free private encrypted messenger and so I find it very good as a price/performance ratio because many don't want to pay and so some come to these messengers.
For me, it remains the best secure messenger of all with a good price/performance ratio. Really top encrypted messenger.
As secure communication tool can get, it far exceeds expectations. Fantastic product with a great UI.
The quality of the picture is so bad that I couldn't use the program. Got headache because it is so unclear.
Very poor customer service (unable to help when you have any problems, and don't care about feedback of users). Extremely poorly coded clients (at least on Android, Linux and OSX).
The calls frequently drop, or some people's audio won't connect, etc. etc. Calls generally have to be limited to just a 3-4 people or the quality degrades even further.