I can count disconnections on one hand over the years. Of course it depends on which server you use. My speed test is between 700 and 900 Mbit/s in download, between 30 and 50 Mbit/s in upload, latency of 1-5 ms at the weekend.
By the way, my connection has 1000 Mbit/s. Anonymity is my top priority! In terms of speed, I can't complain here either. Well, I pay 16.99 euros/month for premium, so not cheap. Other test sites report that is only good, has disconnects, and is said to be overpriced. I am a longtime customer and have had no problems.