I'm in the process of running a POC.
Initially, I've been working on the vendor side and we can only suggest to the vendor how to use Percona Server as opposed to MySQL's community version. I was just working on MySQL Server to see the difference between the community version and this and how the performance goes. I'm doing the R&D on my side.
It's easy to use, and the community is really nice. For example, if I have an issue, I can search for it, and the issue can get solved really quickly.
There are a lot of benefits. The tools which Percona provides for backup and recovery, like Percona XtraBackup, are great.
The initial setup is simple.
It's scalable.
We find the product mostly stable.
It's open-source, making it free to use.
The community surrounding Percona is quite helpful.