When given the choice, every single one of my coworkers preferred the Allerject (Auvi-Q) to the EpiPen because of the voice prompts. I make sure to have two with me at work at all times. I still have two EpiPens in my backpack/purse as they are easier to recognise by the general public. The Allerject are smaller so I can put them in my shorts pockets, jacket pockets, etc. The EpiPens are a lot easier to carry in a SPIbelt though, as carrying two Allerjects side by side eventually stack on top of each other, so I carry EpiPens whilst running or wearing under my shirt if I don't have pockets or a purse.
They both have pros and cons so I have both simply for convenience sake. If I wasn't a runner and always had a backpack or pockets, I'd probably choose Allerject/Auvi-Q over the EpiPen because I get very lethargic during reactions and may rely on the voice prompts should I have to self administer.