I have been looking at the shield. My buddy got one and i have shot it a few times, but i just don't care for the trigger. I don't know if it is just his or not but it has a mushy trigger on it and i just can't get use to it.
I got one for my wife, however she did not care for the recoil so i took it for my pocket gun and really like it. We ended up getting her a .38 snub and she likes it alot better.
I have the same grips on my P89, and i agree makes it feel like a different gun. My p-89 was one of my first hand guns, and of all the guns that have come and gone since i just can't bring myself to get rid of it. Feeds anything i put through it and still looks like brand new.