It’s not bad here. Some aldi brand items aren’t as good (such as their cheez-it), but generally everything is of good quality. I think the only thing you can complain of is that the US stores are smaller and offer less (ex no in house bakery)
Some knock-off products aren't as good as the originals, that's also a "problem" here, but the discounters do this with almost every well-known product and the quality is usually okay.