I work at a University and we currently use HPE FlexFabric to connect our core infrastructure at our data center as well as our backup data center. We use it as a higher switching capacity than the Aruba switch it replaced.
The switch is intuitive and very simple to configure so I would recommend it to anyone for their data center. It allows for someone who might just be a server expert and not a switching expert to have a far simpler time than would normally be expected.
Compared to Cisco, HPE was easier to get support contracts and customer service was far more helpful. Aruba is part of HP but the Aruba line cannot stack up to the Flexfabric in a high-performance data center environment.
I have implemented most of the HPE FlexFabric switches for multiple customers. The primary requirement was higher switching capacity and reliable OS, on top of that IRF stacking technology is excellent to have an error-free configuration and long-lasting reliability.