It isn't as front-heavy as it looks; that yellow thing is a mat weighing a bit more than air but not much.
One pannier is just full of sleeping bag - it a summer buffalo bag, maybe [Edit] 900gm. The other side is mostly clothes with odds and ends. Some museli bars.
The rear had tent, food, tools, cooking gear including pans and stove.
I'm probably going to ditch the bagman and put a rack on the rear, so I can put more weight in the saddlebag, also sometimes I might want to put the panniers on the back and strap a stuffsack on the front.
It handled fine down hills and through turns, ok through potholes, fords and over cobbles. Not so nice at very slow speeds though.