Summary: I run a small network with about 20 desktops. After the upgrade to the cisco switch, three of the on-board realtek NICs (on gigabyte motherboards) would not operate at 1 gigabit and also had horrible performance over windows networking and ms sql server. I'm talking 2, maybe 3 kilobytes per second.
Summary: It is slow to load the web config pages and quite often hangs in mid-page requiring a browser refresh. The 24 port version does the same thing. The 2 fans are loud and distracting. I have it installed near my workstation and it is annoying. If you install it in a rack in a CO I guess it would be OK.
Summary: Beware that when you update the firmware ... as you must ... the boot code MUST be updated first or firmware will be frozen forever at 1.3.5. After making this mistake I called CISCO support: CISCO told me I could only get engineer support if I was a business or bought it from CISCO.
Summary: Cisco kept Bonjour, of all things, but dropped SNMP. I missed that omission in the list of other very useful features, which means that I cannot monitor this switch with our centralized NMS without writing a wget wrapper.
Pros: High port density in an inexpensive switch; solid feature set with LACP, LLDP, port mirroring, QoS, 802.1x and 802.1q.
Cons: No SNMP. Cisco has issued an errata that says the mentions of SNMP in the manual were in error and will be removed in the next iteration of the manual.