What's it for?

A7 is not for chasing racing bikes, though I have managed to overtake a few. Its less than perfect aerodynamics and relatively high centre of gravity won't let you do what Quest and WAW, or even Strada and Mango will.
I think it's good for touring and commuting. It's not as roomy as A4 or A6, but it's by far the roomier option than WAW or go-one. Since it's higher than some other velomobiles, it's more visible, it offers better visibility to a rider and it is less prone to hitting bumps or litter on the road. But if often in the traffic, it's better to get it equipped with turn signals.
It is comfy. Since the seat can be moved forth and back with lots of angles possible, it's hard not to find the set-up you need. Well, it's not as comfy as Orca, in which I felt like in a car, but given ample room for adjustments compared to other velos, A7 is very good in this respect. Yet if you have issues with the lower back, Orca, A6 or Sunrider are easier to get in and out.
It has good handling in most circumstances. Compared to Orca, the A7's steering (A6, A7 and Quest alike) is more predictable. I didn't like the overly sensitive joysticks on Orca. On the previous version of Sunrider, the joysticks gave better control of the ride definitely. Just to illustrate the well-implemented  steering of A7, I recall riding almost whole winter of 2011-12 on Duranos, I'm not kidding! Well, I didn't ride everyday, the winter in Strasbourg wasn't that snowy, but I rode mostly on bike lanes sometimes covered with ice or snow. Plus, I had made the steering rods shorter thus making track shorter and stability poorer. Either I was lucky, or as I stated above.
A7 isn't the best option for installing a hub motor though: either you'll have just a 7-8 speed drive, or will have to install a derailleur and extra cogs. Plus a quite expensive real wheel will be left unused.