TL;DR some tragic design oversights make this fall a little short, tested on a stock C-line 12-speed.
I ordered the RIPSTOP black and got it a few days ago, and am using it with my new, unmodified Brompton C line 12 speed with stock M handlebars, stock saddle, and stock rack.
It takes a little practice to deploy the Invis Bag because the heavy fabric is not the bottom, it is the back. Otherwise, it's pretty smoothly deployed and feels sturdier than it looks. If you're rolling the bike while covered, there is a little buckle and bungee to keep the bag from dragging on the ground, which is nice. The handle is basically the Invis strap with some extra loops to attach the shoulder strap, and they are strong enough to lift the bike without feeling like something will rip.
The problem is the attachment, both of the bag and the handle. The rest of this review is me detailing just how unfortunately almost-good-but-not-good the design is for how this attaches to the bike. I might sound like a snob here but we're talking about a BAG that costs $80 USD before shipping and duties to strap to your elegant and easily-foldable $2,000 USD bicycle. It should be just-right if you're paying this kind of money.
First, there is an issue with the handle that makes it annoying to fold your folding bicycle. Notice where it attaches to the bike in the photos. The gap in the bottom of the handle is supposed to fit around the bottom support bar, where you would put the boomerang bag. If you attach the handle this way, then the double-layer of Velcro (under my index finger in the photo) rests EXACTLY where the rear wheel meets the frame tube while folded (under my thumb in the photo)! This makes it impossible to properly tune your Locking Block - see Brompton's video on YouTube: https://youtu.be/lSYRvL4YSgI works in the USA. This causes one (1) Your Brompton just doesn't fold as far by a few millimeters, which makes it very difficult to lower the seatpost, or (2) your Brompton can partially unfold when you pick it up (from the handle or seat).
I kind-of fixed this by scooting the handle forward which sort-of fixes it (seen in image), but the balance is thrown off, so I can't pick up the Brompton while it's open. You cannot cut off or remove that Velcro strap because it is clearly the main point of reinforcement that secures the shoulder strap! Even now, having reduced the gap between the tire and the frame tube, my seat is still much more difficult to lower if the front tire is still secure - but at least the shoulder strap works!
Vincita - This would be fixed for the next generation if the handle were a little longer, and if there was a hole for the tire to make contact with the bike frame.
Second is the attachment of the satchel that holds the Invisibility Bagcover. The bag's bag.
Videos on YouTube, including Vincita's own video for the (older?) Invisibility Bagcover, show this as a *saddle* mounted bag, but there are problems with that. However, there is a bungee that wraps around the seatpost to stabilize it. While you can attach the bungee to the seat, every time you lower the seat the bungee anchor scrapes the latch connecting the frame tube to the rear wheel assembly. At least there, it is out-of-the-way, but I can tell that the scraping is beginning to damage the sewing of the bungee anchor.
Suppose you attach the bagcover as a handlebar bag instead? When you close the bike, the weight of the pack tugs it against the Velcro - I can hear it opening just a little bit when I close it. I have a Vincita Birch (which is an amazing bag by the way), and this bagcover bag is big enough to bump together with it when half-folded (as shown in the picture), though everything still works.
All in all, it seems like it used to be a saddle-mounted bag and SHOULD have been a saddle-mounted bag. It would have been an elegant and unobtrusive addition to your elegant and cleverly-folding bike. Indeed, it is - except it kind of scrapes its own support off as you use it, or you might even snag the bungee on the bike frame.
Instead, it seems like a somewhat slapdash fix to say "whatever, just market it be a handlebar bag." It does not look good as one; it doesn't surprise me that none of Vincita's ads for this show this thing on the handlebars. It's bulky enough to get in the way of another pack, and when folded it doesn't seem secure dangling from Velcro.
It's a little disappointing because modifying the carrying satchel a little to hang properly without scraping its own supports would make the bag perfect. Similarly, a little more QC for how the bike both folds and STAYS folded would make it a no-brainer for the shoulder strap alone.
The
