I have the Shield .40 and I can reproduce exactly what this person is complaining about. If I do not pull back and let go clean of the slide, the ejector will not clear the rim of the round. In my experience, this is caused by improper use of the firearm. Just as he describes, if he does not function the gun correctly, it will not seat correctly, 100% of the time. The gun works properly.
Additionally, he did indicate that the gun is too stiff for the shooter using this. It is important to note that you must get the gun best suited for the shooter. Not everyone is built the same.
I commend the poster for making the choice to choose the gun that is most suited for her use, rather than her choosing against carrying the gun at all. However, it is an inaccurate statement to say that the gun does not work properly, simply because the user cannot function the slide correctly.
My .02 ;-)