I have had two. Though they are rather funny looking pistols, they shot well and hit the target. In order for them to work properly, the mag must be in excellent condition and all of the parts must be checked out.
As a follow up to the above comment; if the pistol is cocked and a round is in the chamber, opening up the top will cause the firing pin to slip off the sear and the pistol will fire.
When new, they would not open if cocked. More than half of them have been bent into submission. They made a neat takedown tool that doubles as a cleaning rod. Magazines kinda interchange with Browning 1900 magazines. Max