Garagefarm, hands down.
It's the direct opposite from Rebusfarm.
Garagefarm has the best IT-personel support you can find anywhere. They will carry you whilst having problems, it's insaine to which degree they will go to help you out. And I love them for it, and never went anywhere else, because of it.
Rebusfarm, I have a ton of renderpoints there saved from when Corona monthly licences came with 10 renderpoints. I simply dont use them because Rebusfarm is useless when you have for example anima running in your scene. There WILL be issues and you will end up losing more money. They're really shit in a can, sorry. Maybe if you have a scene with no issues for sure.
for example: Garagefarm has a need app for the comp that syncs into Max, and they have a chat window that is live constant. Simply told me to upload with a code you can put in the app and the renders get directed to the correct farm-computers with the correct plugins for you specificaly.
Minor point for Garagefarm is their plugin tends to freeze Max out once the upload is done, the max-window tries to refresh and reload the scene but that can take up to 45mins if the scene is heavy. There is def a delay in that so we basicly save before sending, and force-close once sent so we can move on with other max files.
Is nice.