We provide UpCloud as one of the cloud options for our SaaS database/metrics/messaging offering at Aiven.io and have been extremely happy with their disk i/o performance.

Here's just a quick "hdparm -t" test I just ran on two random low-end nodes:

upcloud-de-fra: 1028 MB in 3.00 seconds = 342.12 MB/sec

aws-us-west-1: 58 MB in 3.02 seconds = 19.17 MB/sec

I would of course recommend everyone to benchmark their actual workload on each cloud option before making the decision.

This is a non-answer. What is the actual underlying hardware? Large SSD arrays? Your serious customers will not trust you unless you answer this question. We will not trust our data to unknown technology.

It is relatively easy to reach 100,000 IOPS in SSD RAID configurations with enough drives. As the GP says, there's no magic here.

I found they way they've written it very confusing, like they were advertising 50 max IOPS, but that obviously made no sense.