I looked at this bike but went with a KTM 640A. Clearly I'm less than impartial with my username. These were *my* reasons compared to the Tenere:
+ KTM 640 Adventure :
Carbed - rarely runs perfect, but will always run
Will go anywhere the rider is able, the difference counting especially in sand (edit: as in this is based on a pure dirt bike with roadgoing mirrors etc added)
Light
Ready to go RTW, not needing even the smallest change/mod/extra. Eg look at the handlebars on the stock tenere - guards? levers?
Flaws are well documented (numerous)
Nothing visibly cheap on it (but expected due to the difference in new cost) everything looks well/over engineered
Looked like it could be dropped all day long with no issue
Massive tank
-640: (now I have one)
Consumption sucks at 60+mph compared to fuel inj bikes
Wiring causing failure of components (most serious for me was the ignition barrel wiring, but was bypassable)
Service intervals very short compared to... anything else

Toolkit is in a stupid place
Not a comfy bike. It's not uncomfortable either. You can ride it as long as you need to.
I love the noise it makes and it's great fun to ride. It has buckets of character.
The vibes are a non-issue. Not a problem on the motorway, and irrelevant if beign ridden 'at home' on dirt tracks. Numbness etc is an internet myth.
The 640 justifies itself if you wish to take it the 5% of places other bikes struggle. Soft sand, tight technical trails, jumps/drops etc with luggage.
If you're not planning on going everywhere, it's probably not worth living with the compromises it makes.
HTH.