If you use verified machines then it's an amazing and cheap service Non verified machines may be bad, offering bad connections and may be unavailable once rebooted, hence the many bad reviews. For this reason, I suggest you to only stick with verified datacenters. I rented an A4000 GPU for many hours and I've never had any problems with internet speed or availability. The price is very convenient at about 0.16$/h. Nothing to complain about, for me it was essential to train some DL models at a small price. Very recommended.

Vast.ai offer is strong Despite some raw edges, Vast.ai offer is strong. I managed to escape this crappy Kaggle-to-Colab-and-back tinkering with frequent disconnects and got very powerful and manageable workflow with remote jupyter kernel from vast.ai machine inside local VS Code.

very bad site very bad site, waste of time and money very bad support they don't help you at all instances disconnect after a while and data will be lost stay away from this site EDITED: 100% scam, machine down randomly, 100% scam, data lost, without any notice

Cheap and usable Cheap and usable, can't ask for more. Only downside is expensive data transfer charges. Otherwise fine.

scam website scam website. always throttles your download speed to get more money out of you and never refunds it, many instances break or don't work and you're of course charged and not refunded. Customer support don't do anything they're useless - complete scam I will never be using this website again.