Well, my Husqvarna Norden specific tank bag arrived yesterday, and at first blush, I'm kinda not impressed. The tank ring is really nicely formed and finished, and feels super solid and well made. The tank bag itself, on the other hand, is a little awkward. It's bizarrely tall, even in its unexpanded state. I suppose they have done this to actually give it some sort of capacity, since form fitting it over the awkward tank shape makes it really lose a lot of volume, but I would have personally preferred a more compact, tighter fitting, lower profile bag. In the fully extended position, it seems like it might really be in the way, and absurdly tall. From being packed down and compressed in the box during shipping, the top portion of the bag (everything above the internal stiffener) has taken on the appearance and feel of a discarded and dried out orange peel, which really gives it a sort of dumpy and unappealing appearance.....I'm sure with some sun and time it will return to its intended form, but even so, the whole extra zipper extension thing feels bulky and poorly designed, as it leaves an awkward heavy roll of vinyl on the inside perimeter of the bag when not in the extended position. While I imagine the fabric/vinyl itself is waterproof, it all comes down to the zipper, and there are no storm flaps on this, so in heavy rain I imagine it will leak. There are also no charging access points leading to the interior of the bag, so one would just have to close the top zipper around a power cord, which would definitely make for a leak point.
It should be noted that I am personally looking at this from a primarily off road perspective, so am especially concerned about the bag being in the way, and especially when standing. For road biased touring, it might be just fine. I do like that it has a clear map pocket on top, as that is actually something I like to use, even when running a GPS.
Even with all that complaining, I am still considering keeping it (!), as I really like the simplicity and ease that comes with a magnetic system, and also because I have another magnetic tank bad that seems to work with the stock Husqvarna ring, but it is a little on the expensive side to keep just for occasional use, and/or certain trips, and to not be able to totally rely on it in the rain......