So I opted to get beta unit of wifi access point. It's a tiny USB device that you plug into a usb power brick. I used iPhone's 5w charger.
I followed the setup process video and it worked on the second time. First time AP couldn't find my sesame. I had the virtual station app running on my phone, so I tried with virtual station removed and AP found the sesame. I'm not sure if VS app stopped AP from connecting to Sesame, but if that's the case it should be documented in the setup process or fixed as a bug.
As for the operation it seems to work very well. Overall my phone connects to sesame (via wifi) faster because sesame is already connected to the AP, while features that require direct BT connection such as Auto Unlock seems to work about the same rate so I haven't noticed any penalty from switching between hosts. My only question now is if and how Wifi AP's constant connection would affect Sesame's battery life, but I suspect that developers must've counted for that.
But before the connection is established, sesame app quickly flashes through 'busy' and 'sesame discovered' screen. I think the app should lower the threshold for those pop message so that the app doesn't look so busy hunting for the connection and freaking out about busy signal. If whole thing happens that quickly, simple 'connecting to sesame' would be fine. Only when busy signal lasts longer than certain length you can perhaps tell users what's going on. And 'sesame discovered' sounds more like pairing and initial connection stage message.
I haven't tried a true remote operation while I was away from home. I'll report how well it works, which I expect it to. But so far I am happy with the wifi AP, and after a long wait sesame is finally ready to become what it was meant to be to begin with - a truly connected device.
My wish for the Sesame / Wifi combo as a whole package is integration to bigger smart home platform. I'm still awaiting HomeKit integration, and others like Alexa and smartthings. I am hopeful they are coming.