Works well with plug-in CPAP machine and my laptop. Haven't really used it for extended periods, though, so can't comment on longevity. Does hold its charge well over weeks of non-use. This is a major improvement over my old Yeti 150, which didn't live up to my expectations.
Fantastic little unit, Perfect pairing with the Boulder 50 panel. Keeps everything charged when I'm out and off grid. I find that it has a hard time keeping up when powering my Dometic fridge. That being said I'm considering getting a larger unit for more power capability in the future.