I got Renegade WWI and WWII Germans and their quality is quite different. I found the WWI ones to be rather nice. A bit beefy but that's alright. The backpacks took some cutting, filing, and reshaping, but they were nice minis.
The WWII Wehrmacht ones are pretty bad. They are in strange positions and they are HUGE - totally out of scale with Artizan (my Wehrmacht collection is 90% Artizan).
I find that Copplestone can barely mix with Artizan (but they can). However, these Renegade Wehrmacht minis simply can't.
Now that being said, Warlord Games just released plastic Wehrmacht minis and those are too fragile (the weapons and hands, at least). They are just a bit smaller than the Artizan minis.
I just built some last night and haven't painted them yet but I'll see how they look once painted up. I think they'll scale alright with Artizan but those Renegade ones are so different that they are a different scale entirely. Closer to 1/35 than 1/56 (which is 28mm usually).