I had to monitor how a service behaved for users in Azerbaijan over several hours, and the Azerbaijan proxy server
https://spaceproxy.net/en/proksi-dlya-azerbaydzhana/ handled that without any drops. The stability allowed me to leave tests running without constant supervision. I appreciated that buying additional proxies was quick when I needed backups. The interface made it easy to see everything at a glance. It reduced a lot of manual checking on my end. That kind of convenience really adds up over time.