Late last year I replaced my core network switch with a 24 port Ubiquiti Unifi (US-24-250W) managed switch. The Unifi switch was offered on E-bay at an attractive price. It fit into our existing Unifi cloud-key managed Wi-Fi arrangement, so I splurged.
In general, the Unifi switch was a good upgrade. It let me make greater use of POE. It made Wiresharking SIP traffic more convenient.
Alas, I stumbled upon an issue that I had not expected. It was noisy. The noise was the result of a pair of cooling fans.