Murderbot is indeed somewhere between OK and good—personally I’m leaning towards good, but I wouldn’t compare it to a masterclass in short-form writing (like anything by Sheckley) or a longer piece you could debate for hours afterwards (like A Memory Called Empire, to give a recent example). It doesn’t try to be mind-numbingly flashy, it doesn’t proselytize, it just brings you to alien vistas to meditate on the nature of universal human experience. That is to say, it belongs to a good, storied strain of SF that’s quite rare amongst its modern specimens.
I’d rave about that.