I am satisfied with my purchase.  This unit is exactly as it is advertised.  It looses a star because of the inability at this time to replace the battery.  I am hoping that situation changes in the future though and that there will be an aftermarket battery for this.The unit couldn't be more easy to use.  I intend to charge this unit in the future via solar panels and haven't had the chance to try that as it has been overcast and rainy since I received my order. I have been testing it for a few days by charging it with the AC power pack though.  I find that the advertised power and times are accurate.The radio works fine.  The unit puts out the advertised power, the AC charger works as it should, and the cooling fan inside the unit is quite.So far, I used it to power a lamp in my living room for about 4 or 5 hours with a 23 watt cfl installed.  At the end of that nights use, I looked and the power meter said 40% left.  I did not confirm this with a DVM though, so I don't know how accurate that was.As far as build quality, it is fine.  Some have said it is "much better" than the "cheaply made" Black and Decker Electromate 400(which I also have).  That is false, build quality seems about the same to me.The only quality difference I would note between this unit and the BD is that the cooling fan on this unit is much quieter.Aside from build quality as looked at externally, there are differences to these two units.  The Duracell has a 28 AH AGM(Absorbed Glass Mat, which is the top of the line in sealed lead acid batteries right now) deep cycle, and the Black and Decker has a 19AH battery.  I can't remember if the BD comes with a Deep cycle or not,  The Black and Decker has one less AC outlet, a less robust AC inverter, and an additional DC outlet(which I find very useful to daisy chain these units together with in parallel).  The Black and Decker has an air compressor which is useful, and the Duracell has a radio which is also useful.I personally like them both.  We will see in the future how reliability plays out.For now, I have used every feature on both units and both units work as they should for their respective purposes.Mark :)