The 12 LC gigabit ports are the best thing and next is the ability to stack it with the 5520 & 5510.
Great price and flexibility your have 1gigabit ethernet port, 1 gigabit LC fiber ports and 2 10 gigabit fiber ports
The 24 ethernet ports are not powered ports.
Your get a lot of bang for the buck with this switch it is very versatile.
This is a perfect solution for aggregating uplinks from various locations. This switch has 12 LC gigabit port and it can be stacked with the 5520 or 5510. Great