I used to have a WWII byf code Luger made in 1942. I personally found the ergonomics to be overrated. Yes, the gun points naturally, but the grip felt so wide, front to back, at the top I never really liked the feel of it. The safety lever works backward of what it should ergonomically as well. And finally, the magazine was an absolute bitch to load without the assistance of a loading tool.
That said, I've always thought the claims about the Luger's alleged extreme unreliability to be overstated as well. I never had any malfunctions out of the thing, and it's worth remembering that the Germans didn't replace it with the P-38 out of dissatisfaction with its reliability, but because it was an old design that required too much machining, and was therefore very expensive to produce. Yes, it is more apt to get dirt in the mechanism as a result of its design. And it's more sensitive to variations in ammo. But it worked well even in the muddy trenches of World War One.