I think HKs are massively over-engineered for the average civilian CCW holder's needs. If you told me I'd need to swim ashore and spend six months running through the desert with a handful of spare parts, no armorer in sight, and needed a pistol I could rely on utterly, I'd pick an HK every single time. That level of extreme reliability is not something I need during the daily commute, and there are more than enough other offerings out there with perfectly acceptable form and function for self-defense.
That crazy over-engineering sure is comforting, though. The fact that the P30 is arguably the most comfortable pistol I've ever held didn't hurt in the decision-making process, either.