Conclusion: So far I have tested three NZXT cases and each one has been as good as the last. The Guardian 921 is a solidly built, sleek looking well designed case with the gamer in mind. Although it is heavy and not one you will one to drag to LAN parties, it is a case that will make your gaming rig stand out. The three 120 mm provide excellent cooling and there is plenty of room for expansion with the large number of expansion bay slots.
Conclusion: There are a few downsides though to the Guardian 921, and they may be personal opinions, but I feel the lack of fan grills and the inability to show a more accurate temperature reading is something that needs to be addressed. It’s easy to throw some fan grills on there, and an upgrade to the monitor should be easy as well for NZXT to take care of.
Pros: Inexpensive, Looks great, Well made, Silent, Integrated temperature monitoring, Tool-less installation, Three fans included, Nice looking side window, 3.5" to 5.25" adapter included
Cons: Motherboard tray not removable, Might be a bit flashy for some, LCD Only shows whole numbers, No fan grills, Only three 5.25" bays accessible from outside