I had one.
I was attracted by the size and concept.
Unfortunately, the thing only worked intermittently. When it worked, it was unpleasant to shoot.
Try as I might, I couldn’t get it to function reliably.
My gunsmith couldn’t get it to run and threw up his hands in frustration. He’d called around to colleagues to see if anyone had had the same problem or had discovered a remedy. He discovered that, for those who’d encountered the gun, the experience of unreliability was common as was the inability to fix it.
I got rid of it after investing as much trying to fix it as I had in buying it.