Mostly, their support is also great at reacting to issues but moreover, proactive to prevent issues.
The issues with these switches are extremely rare, and the whole product line is very predictable and stable.
The features I found most valuable are the ease of deployment, it's easy to upgrade, easy to configure and easy to administer. There is no need for vendor professional services which saves project cost. The usage of WebUI for all primary features like hostname, IP address, SNMP traps, zone sets, addition and deletion of zone members or zone sets, backup of switch DB is very simple.
The most valuable features are stability and response time.
The most valuable feature of this solution is that it is easy to manage and easy to use.
It's actually shaking hands with the workflow solutions much better than any other storage.