Do you need one license for Android and an additional license for iOS ?
Is there a pricing option that includes both ?
What is the guaranteed turnaround time for support tickets ?
Who to contact if a device is asleep, locked, turned off, etc ?
What is the cost for dedicated mobile devices ?
How long are test results stored in the cloud ?
I use Java + Appium for real device testing in BitBar cloud.
In your case, it looks like they also support Detox, please refer to this link:
There is a free trial and IMO their support is very good.