HKs are very reliable, durable and accurate. Although the HE finish is not as good as the Tenifer, its still very good and will never give you problems. My Hks (USP9, USP40 & USP40C are in the 2000 to 3000 range while my USP45C just hit 1000. Not one single malfunction what so ever! None. I keep a detailed log of the rounds fired from all my guns on Excel spread sheet so I know that not even one malfunction can slip by me forgetting or something. Also, no parts have been replaced or even looks near needing replacement. They look as if its just getting broken in.
A friend of mine bought a USP40, first production run back in 94 (IIRC) and till this day, after thousands and thousands of rounds, still works great without a hitch. Nevered needed servicing.
If you already got Glocks, get the HK. Who knows, you might even ending becoming a HK fan.
ST
P.S. The checkering on the HKs do feel kind of rough and might dig into the hands but relax, a little sanding will make it all better. I did that to mines and now, it fits like a comfortable glove.
Get the HK, you wont regret it.