"The most secure lock"
On a door made almost entirely of glass.
This product seems like it's riddled with drawbacks.
One, there seems to be no mechanical backup of any sort. None. What happens if my batteries die? It says well, just replace them before they die. But what if they die already? Well don't let them! But there is a non-replaceable backup. But what if that fails? Well it sounds like you're shit out of luck.
"The Otto lock requires a properly aligned door within certain dimensions"
It's also not a universal lock solution - it's a very limited compatibility with only a slim percentage of existing door-frames. AND they force you to use their 'partner' to do the install.
Then looking at the design, I could almost guarantee their claim of "Otto has endured .... extreme climate conditions". Really? So, if your door is facing the ocean on a coastal block, it's going to survive 24+ months of salt spray? I've seen very few electronic devices that do well in that kind of environment. The mechanism looks extremely complex, and I can imagine salt would build up in there in no time.
Don't get me wrong - this is pretty cool and would be neat inside an apartment building or something. But I would be extremely hesitant to rely on it.