I have a metric set of narex chisels, and metric never bothered me until i got to chopping “1/4″” mortises inside 1/4″ grooves for the tool cabinet. Its undersized enough to be a pain in the neck. I get alot of chipping in the cutting edge when doing chopping, and i need to sharpen up after about two mortises. I don’t have any other chisels to compare that to, these are my first chisels. I can tell you that these rust in a bad way. I was away from home for almost a year, during which a slow water leak in my basement workshop led to high humidity and surface rust on everything, and swelling wood and mold… a nightmare. But these chisels, in their closed box, rusted worse than anything in the shop. Deep rust too. I managed to save them, but took some heavy grinding and hours of reflattening.
I’ve been using a set of imperial sized bevel edge chisels for a few years now and am very happy. I was not able to find the Aldi chisels when I started this hobby. I find they are easy to sharpen and hold an edge pretty well. I never had any rust issues with them. Even when I was moving from state to state and they were stored in an out building while I was finding a new home.