I've used Igmans' 139 grain ammo out of my Ljungmann since day one and have yet to have an instance of cases being ripped apart, or even being trated poorly beyond a few halfway closed necks.
As far as complaints, no, I don't.
Mine, with aforementioned Igman ammo, with do 1-2" groups depending on the day and me, recoil is neglible, and it's rather easy to strip apart.
Some people don't like the sights on them, but I find them rather nice to use, and the rear sight can be taken apart and adjusted for using the old roundnose (160 grain I believe), or the 140 grain bullet.
And they're cheap, far less so than a Garand, SVT-40, or Gewehr 43.