I bought this gun about five years ago and sold it about two years ago, a KP90DC model which is the stainless version, decocker only. It had hogue grips and was a big mean chunk of steel. It felt like I was holding Megatron from the old Transformers cartoons compared to the polymer wonders of today.
It was a reliable gun that will chew through any ammo you feed it, but the magazine capacity makes it less of an efficient gun given its size. It served me well as a bedside home defense gun for several years and I had the utmost confidence that it would go bang when called upon. I only paid 250 dollars for mine at the time, and the price they can be had for has risen substantially since then.
At $300 I think its a great value, At $450 i think you can get more bang for your buck in a more versatile carry or home defense firearm that will allow you more magazine capacity at a fraction of the size and weight. That is why I do no longer recommend this firearm for a person who isn't just in love with the steel Ruger P series weapons.