Cyberian Mine GmbH is a German-Russian joint venture cryptocurrency mining company. It provides mining hostage services for its clients with an electricity cost of €0.03/kWh, achieved by green hydro-power stations, with free natural cooling in Siberia’s low ambient temperature. At Cyberian Mine, the user can choose to buy a mining device from them directly or send its own mining device to perform the host mining service.
Good experience overall. I didn't have any big problems with it and in general everything went smoothly. I think it's justified that the pool isn't the cheapest. Moreover, they offer good support, which is also important.