I have the original guide 10 and the nomad 7. Overall I'm very happy with the product but do have one big beef in regard to charging devices from the battery pack:
I've found that with a fully charged battery pack, that when I plug my device in to be charged, it'll begin charging only to the extent that the charge between the device and battery pack becomes neutral. In other words, if my device is bone dry empty on power, and the battery pack is 100% full, when I charge the device, the device only goes to about 50% if I leave it connected and unattended. This isn't to say that it won't charge the device above 50%, it does, but ultimately, once the battery pack is depleted, the battery pack then starts to suck power back out of the device it just charged (in other words, it starts charging itself from the device it just charged). The battery pack should be a one way street when charging another device so that once it's empty, it stops/shuts off and doesn't then start to draw power from the charged device. If anyone else has this issue or a solution (other than standing there and watching it the whole time) I'd appreciate it.