I would consider following things before selecting a database offering:

- Whether the database vendor is a lock-in. It would be a straight "NO" for me if the database isn't open-source with proper license, since I can't self-host it in case, I need to move away from their SaaS offering due to various unexpected foreseen reasons: vendor decided to increase pricing, vendor has hidden pricing, vendor has reliability issues etc etc.

- How big is the community behind the database. Check their public forums to understand how community feels about the database and how their requirements are considered.

- Don't believe any random benchmarking post online but by doing my own benchmarking for my use-case.

- Check which other companies have adopted that database and read their experiences.