I went to a conference today. I spent the day in sessions listening to presentations and taking notes. I was using Evernote and my notes included photos of what was being presented & screen cuts from soft copies of presentation material. I was also browsing sites mentioned in the session, adding tasks, emailing the occasional bits of material, looking through presentations in advance to decide what to attend. And on the way there and back, checking train times, listening to podcasts, checking emails, checking the news and even a phone call.
The LG G flex lasted me the day easily. And more, this is the best note taking device I've ever used. Pen and paper can be great, but I end up with lots of notes. I found it faster and more versatile for the range of things I was doing compared to using iPads, laptops, and range of different Android devices (including the whole Note range, nexus 7, 8", 8.3", 9" and 10.1" sizes).
The g flex fits into my jacket and trouser pockets, meaning that I didn't have to carry anything around between sessions (papers, tablets...)