With 300 individually labeled chests, 190 weapon racks, 116 weapon and shield plaques, 60 mannequins, and 24 weapon displays, storing your stuff was never so much fun.
Now I know what you're thinking, "300 chests and 190 weapon racks?!?! This place must be HUGE!" Well you're right, it is huge...BUT, there is a "control panel" added by the dwemer that will instantly move you to strategic points around the armory. There are levers all over the armory that will instantly take you back to the control panel! Believe me, there is no better way to store you stuff than the Dwemer Armory.
But the Dwemer wouldn't be satisfied with a normal armory, oh no. There's also a wall mounted map that the dwemer used to transport, well I won't go into the details here, but suffice to say it's alot easier to get around Skyrim if you're leaving from the armory.
You can find a spell tome next to the river just before Riverwood that will teleport you to the Dwemer Armory no matter where you are (a second copy can also be found in the Spell Tomes bookcase), which is quite conveinent when you're at the end of another dungeon crawl and don't really feel like slogging your way back out. Also, there is a spell tome called "Return from Dwemer Armory" (found on top of the black soul gem cabinet), which will take you back to the last place you teleported from. (Very nice if you're facing down a room full of Drugar and forgot to bring Dawnbreaker with you).
And there's a garden, too, with dwemer grow lights :) And 10 of the chests are refrigerated for storing food!
Oh, and a full crafting area, and the storage containers for the crafting area are near the stations that use them! Oh, and the Standing Stones are there for when you need a pick me up before smithing (warrior), or enchanting (mage), or making potions (thief).
Also there are the shrines to the 9 divines (and Nocturnal for your thieving types).
Oh yeah, and there are 6 large, individually labeled safes for storing your most important stuff.
There's also a swinging bachelor pad for you to use when you need to get some rest.
Also, say hi to Du'Latorn, the immortal merchant. She'll be happy to buy whatever you're selling, provided it's not stolen.
One last thing, it's fully navmeshed.