You get what you pay for. How do these cleaners do it so cheap? They cut corners in cleaning and pressing. Your garments are cleaned over and over in the same dirty solution as the last batch. As far as stain removal goes, you don't actually think they will spend a lot of time trying to remove stains do you? After all, some stain removal chemicals cost $45/gallon.
Some places do not even use detergent. Yes, even dry cleaning has to have detergent so that all the dirt and grime do not redeposit back into the garments after the washing phase. Its sort of like taking a bath after someone else if you do not use detergent. At $75/gallon, I doubt I would use detergent either if I was charging only $1.97 per garment.
They use "slam bam" method of pressing. Garments are sent through steam and pants are pressed hard. Hard pressing is good for some fabrics, but can shorten the life of most finer/delicate fabrics.
Don't get me wrong, not everyone needs or can afford proper cleaning and pressing methods and these "one price" cleaners fill that need. Basically, if "one price" cleaners does a good job for you please continue to go there Or if you are a person who drives a BMW, Mercedes, or another luxury vehicle and complains about having to pay extra to put premium gas
ha ha!
Just for disclosure, I am in the dry cleaning business in the area and have researched the "one price" cleaners' business model. I will also refrain from naming my cleaner because advertising is not my intention.