Not as bad as nicehash but miningrigrentals has received more negative reviews for the past year via Trustpilot.
I tried it with a Russian rig, it didn't work, the miner had gone offline, while the site was telling me that my pool was offline instead. I called support, they answered me within a couple of hours, and refunded me. Good service.You can buy hashrate from the miners on the this forum 
I paid 20,000 sat for 250 TH/s for 8 hours. If anyone has a better offer to make me, they can message me in private.