I’ve put about 250K rounds through various HK weapons,haven’t shot a P30 yet.I would say that any gun that HK brought to market would be worth owning.
I had a P7M8 that was absolutely superb.
HK guns are generally very fine but I have owned 2 which were dogs.
The first was an HK4 with a .32 and .22LR barrel. It worked fine with the .32 barrel but the .22LR was a jammer.
I also had a VP70 which had the worst trigger I have ever encountered. I think it was the first polymer pistol tho.