Can't claim my experience is typical, but here it is for what it's worth.
Having lost virtually all my 'old' modling gear in one of life's little setbacks, I found myself looking for an inexpensive short-term AB/compressor option, and took the plunge for one of the cheapo packages on the well-known auction site: I think it was then (ca. 2008?) about $60 for the pair, including shipping. The AB, while eminently functional, just never really suited---and I replaced it with my favorite Anthem at the earliest opportunity.
The compressor---which can be found all over, and goes mostly by the model # TC-80---turned out to be th real prize. I bought it expecting to mabe get a year or two's use out of it, and having nearly zero expectations as to quietness and so on. It turned out to be what I would call 'room-quiet'---a not at all objectionable 'muffled' operational sound, WAY quieter than my old 1/3 hp Sears Craftsman model that lasted close to 30 years (but 'clattered' from day 1).
The TC-80 is still going strong 8+ years later. I use it probably once or twice a week average, total of 40 min. to 2 hours, depending on what I'm working on. Only minor annoyance is that it cycles on and off frequently, with no tank to speak of, but as quiet as it is that's rarely a bother. [BTW, I usually listen to my desk radio/cd-player or a nearby TV while I'm working, and the compressor is quiet enough that I don't have to adjust the volume.]