Yes, I think Easy Glider may be correct, I only usually use Gazelle for short.
I very much like the Quando and it was one of my bikes, but I've now converted it into my Q bike. The Quando is a great hill climber on motor alone, but as it only has one gear of nearly 70", the rider can only help between about 8 and 14 mph. As a result, it can't handle the steepest hills. It can carry my 70 kilos up 12% without pedalling and can even restart on that without help on that. When the battery is freshly charged it can do it on 14%, but even with me helping with a lot of effort, 20% is a bit too much with that high single gear. With your extra weight it would probably be impossible.
I therefore did a major conversion to add gears and make many other changes, but that's not easily done as you'll see
here if you're interested.
You can also read about it in it's original Quando form on my web page
here.
.