Decided to seek out Oma Kleinmann's after seeing other reviews. Didn't book but was ok getting a table. Ended up with some locals sharing which was nice.
Probably the best - and biggest - schnitzel I've had. Large variety, freshly made (clearly not bought-in) and, depending on the variant, served with Bratkartoffeln, fries or Spätzle. There is either veal or pork. Large side salads with really nice dressing. A lot of locals eat there - always a good sign!
Waiter was really helpful.
Kölsch was Sünner which is a little less common than some others.
Definitely worth the tram-ride out of the centre.
Will be returning to the city with my family soon and will do my best to get back for another schnitzel!