I don't like Aldis to be honest. If you like it - more power to you!
The shelves are usually stocked with whatever they could scrounge up for that particular store. The cashiers are half ass and barely care. The no bagging thing really sucks. Did I mention you pay to use carts?
Their store brand is pretty low quality - until you get used it. My parents are big fans, but I rarely if ever shop there. I seem to have one bad experience after another at Aldis.
In a nutshell they are a dollar store who pretends to be upscale, with a penchant for extreme stinginess.
If you can't bag your own groceries, I consider you sub-human. There, I've said it. I fucking hate waiting for some lazy fatass that just stands there until someone else does the work they are supposed to be doing, holding up the entire line. Bag your own groceries, people. It isn't difficult, and in various states this is already required.
If you can't bring your own bags and do this all yourself, you're subhuman. There, I've said it.
You don't pay for the carts, you put down a "deposit." You get your precious quarter back when you return it. It's the european model of eliminating waste and being responsible. The sooner all US stores adopt these far more sane policies, the better we will all be as humans. The workers there are actually super fast, as I believe they are required to clear your products off the belt within 30 seconds. So, not sure what your complaint is there.
As for the products...yes, they aren't top shelf and most stores do look kind of junky, but that is where they realize much of the savings in their prices. They are far from a dollar store, as the many of their products are actually higher quality than what you will find in most US markets: the cheese is better, but limited in selection. Produce, afaik, is generally more local.
Aldi isn't really a one-stop shop for groceries, but it probably is for some people. They are also currently undergoing a large renovation of many of their stores to try and bring it more in line with typical markets. One of the ones near me has eliminated that single-lane model that forces you through the junk as soon as you enter. It's more open and the produce and meat sections are cleaner and more organized. No wonder it's nearly impossible to find a parking space at that one on weekends.