|For the P32 - You can get by without this, but getting a third finger around the grip - well, you can really tell the difference. The tradeoff is it's a little less of a pocket pistol. But I do like it on the P32 - I have two mags with it / two without, and go with the whim of the day which way I go.
For the P3AT - this is where I definitely give it 5 bullets. I won't shoot or carry my P3AT without this extension. The difference is noticable and the extra control really helps with accuracy.
If your fingers aren't too large, you can "Dremel" off some of the extension to take off what you don't need. I've taken off that last protrusion at the bottom groove of one of my extensions - I still get the third finger wrapped firmly and it makes for less of a hook to catch your pocket. I'm considering modifying the rest of my mags...|