This feels hard to recommend, but I love the concept. It's small, effectively funnels your mags, and (best of all) doesn't ruin the aesthetic.
However, it made locking my mags in much more difficult. Instead of watching myself insert a mag, I now have to consciously yank back on the magazine to seat it, and even then it is extremely tight. Also, the flapper hits the rear screw housing and it feels like it barely releases at times.
I think the solution may be sanding down the back of the flared magwell where it may be touching the magazine, a new design with the rear screw directly under the gun's magazine well and therefore further from the flapper, or moving the screws to the sides rather than front and rear. I'll work with mine for now, interested in a gen 2.