This could be a deal breaker for a lot of people:
The trigger doesn’t reset. If you pull the trigger, and then run the slide while still holding the trigger to the rear like you would on a Remington 870 or a Mossberg, the trigger will simply go dead. We actually tried this on several models and it was the same on each demo gun.
There are a lot of comments over on Caleb’s blog addressing this issue. Some people suggest a Kel-Tec rep told them this actually only happens on the civilian models, and the LEO ones work as one would expect. Others have the whole “But but but it’s a prototype!” rhetoric, which I don’t know if I buy either.
I sure hope they fix this issue.