I bought this as a whim back in October last year. Reason being I attend lots of Raspberry Jams, yet power points can often be an issue.
Whilst I have over a dozen power packs now running various projects, very few feel well built, in fact this one feels like if it's dropped it won't spill its load, it also feels strong and sturdy and also looks great.
It comes with a nice travel bag to keep all the leads together, has a built in torch and two usb sockets with one at 1amp the other at 2 amps meaning you can run two Raspberry Pi s together or run the HDMIPi screen with no problems.
I've tested both ports with a multimeter and can confirm it kicks out a healthy 5.25v and the ampage is what it claims. Many companies will claim that there's can run at the packaged volts and amps but very few do and this is the only one that can run the HDMIPI.
So running time, my wildlife pi camera lasted the entire night with plenty of charge left on it and when running off one of these at events I can safely say I know will never run out of juice too. I believe I can get nearly two full days out of it which would be plenty for the wildlife cam.
Yes this is also weighty and takes longer to charge, but if this is an issue go for a smaller device as this is big and heavy due to the amount of juice it holds.
So do I recommend one? Would I buy another? The answer is yes and as my other power packs pack up I will be replacing them with more of these. They also come with a good warranty if you register on their site and good customer services so you know that if there was a problem which I doubt you will have, that it will be sorted fast.