Agree. 8 hours is a struggle. You get 5 hours of serious focused attention from me...then I lose steam and half heartedly answer questions and fight to keep my eyes open and focused or zone out in a meeting. But the 5 hours I do is laps around my coworkers and solid friggin work. Also to note I work remote and it's the only reason my 5 hours is so fruitful.
10 hours would be a nightmare.
It scared the hell out of me the first time because it somehow knew what I had in my arms and I didn't know what to scan to check out. But the items kept appearing and I didn't know if they were actually mine or not and it was a very creepy black mirror-esque experience for me.
Great store though, really impressed.