It gets the job done. I bought my gf a PA 4 channel amp to power the JL coaxial speakers in the front and to power a small JL 8w3 sub and its doing a great job at it. I dont know if it does rated power or not but it dont really matter because it did a good enough job for her and enough for me when I drive her car. I bought the amp for about $100 and it was rated at about 70wRMSx4. It never got over heated even during long drive during the summer time.
As far as quality wise I havent had any problem. I've heard mix review on this brand. I would say they are good if you want something on a budget. Another brand to look at is Profile which is another good budget brand.
as said for the money they are a good amp there are much better ones out there though abd some for basically very little more money than the pa's are.... just my 2 cents.