My one gripe is that it doesn't charge on a mini C like ever other small electronic or battery pack meaning I have to find obsolete cables to charge it on and it charges slow.That said it is sturdy and has worked well for a long time.I also like that it responds to an active draw instead of having to be manually started each time with a button.My electrical wiring needs to be replaced so I am forced to run camping lights in some rooms and this small battery runs my kitchen light for a week at a charge with full brightness as well as working well at charging my phone with out needing to be powered on and off.Between it's small size and weight as well as not having to turn it on and it's longevity, I find this unit to be highly useful.