TrueNAS - an excellent, cost effective solution without skimping on features.

We use a redundant set of TrueNAS M40 all flash as our primary datacenter storage devices. Most of the usage is general office files. I also have a scratch-built system running TrueNAS core as a secondary data storage device. Both work very well, they are fast and robust and have had no issues in six months of operation. We definitely noticed a performance improvement over our old HP MSA unit, and they are much easier to manage as well. Salespeople from the parent company (iX Systems) are also excellent, they were never pushy and wanted us to find the right fit for our business instead of overselling us. I also had a great experience with their support teams, both with the included setup service and post-setup support. They're quick to respond and fix any issue.