The Armory Wallet is a cold, multi-signature and open source wallet that supports only Bitcoin. Only Bitcoin it is leaving the very numerous crypocurrencies out there. One can also see this advantageous as it provides the best of security available to secure the one and only cryptocurrency they support, Bitcoin. Every great companies started from the scratch and so is the Armory. It started operations since the year 2012 with Alan Reiner being the Mastermind behind the wallet. Due to the fact that it has been in operation for a long time now, it happens to be one of the first in the industry to have an active offline mode and amongst the oldest cold storage wallets for Bitcoin.
The fact that the wallet utilizes the cold storage type makes it an impenetrable place for hackers. But, the fact that the platform has stopped being active since the year 2016 is questionable. Ever since that time, the Customer support was left with the FAQ (Frequently Asked Questions). Although these FAQ answers almost if not all the questions users should have, it's not too comfortable to me. Help can also be gotten online from other users past experience.
The wallet makes it possible for users to make some purchases even when offline, leaving it as a very active one. The wallet is yet to have a mobile application and so is limited to only desktops and can be freely downloaded on almost any type of Operating system. Talking about it's user interface, I don't find it too attractive due to the fact that their customer service is not responsive at all but their applications has all things properly outlined that even newbies can freely use it. If your choice of specialization is Bitcoin only, then I think you should try the Armory Wallet but, if yours is a wide variety of cryptocurrencies, then it shouldn't be tried all cos Bitcoin is the one and only cryptocurrency it specializes in.