I had a similiat model - a Colt Pony - stainless. It was the DAO version of that gun pretty much.
I had 1 issue with it - the slide stop kept peening the slide. Basically, when the slide stop kept the slide open after the last shot, it slowly would bend the metal on the slide. I ended up sending the gun back to COlt, who replaced the slide. Then, after the very 1st trip again, it started doing the same thing.
I no longer have it.
I have heard from others online that this was a common problem for the Colt Pony and the Colt Mustang - the SA version. It supposedly only affected the stainless versions, however. The blue steel version supposedly didn't suffer from this.