I personally don't care for bottom buttons... Well the SD was OK as long as you never dropped it, and everything was in working order. I had several SS bottom button rigs. They were a PITA because of things like no locking, essentially having to use my pinky (weakest link), incidental firing when setting it on end or in my pocket, PITA to clean and keep firing correctly... (I have no xperience with the Don button). Personally, I like my GG buttons on my two GGTS's. Sometimes it is a little finicky, but a soak in alcohol and a cleaning of the contact and center post usually bring things right back to peak working order. As far as using noalax or anything else on the switch/button, my experience has not been positive. It made my switches "sticky" and finicky. I can tell when it's just right though, as I don't even have to press hard and instant sizzle. The ONLY thing I don't like about my GG button, it makes my GGTS not compatible with a certain e-cig case I have. No worries though, as I came up with another solution.
Now, on the other hand, for those that do prefer a bottom button, this is an interesting idea. I think it should be embraced as an option on a GGTS and a detailed explanation given. Or Imeo could even make an optional bottom button for GGTS? However, that is not a GG original idea, so to speak... and maybe not a really good idea.
EDIT: OK I am watching the video to see how this is done now...