It does look like fun but not terribly practical, doesn't seem like it is meant for much more than running around town. For long journeys with a bit of off-pavement thrown in, I would prefer the R1200GS.
And if you happen to be a bit vertically challenged, no problem:
Saw one at the dealer a couple weeks ago (while buying a new oil level sight glass - what a mess that made of my boot).
The "poser" part is debatable, but it's certainly designed more around "style" than anything else. I tend to go with ZM's take, as I think all factory bikes that give you a ready made "custom" are pretty much poser bikes, including all the V-twin factory choppers, but others may differ. Back in the day, I suppose the R90S could have been viewed that way, but when it's a design created around function, I see it differently.
I'm short . That's my first consideration and thus a BMW that fits first off and is essentially stripped down to it's basics is appealing . A GS looks like battlestar galactica to me .
A poser bike ? I'd say that 95% of the super bike category satisfy that qualification, they're all far faster and more powerful than necessary for anything but track days. So I thought the RnineT was pretty good, not a long distance cruise or tourer but as an everyday sport bike it looks pretty good and it's something I could happily swing my leg over.
"You ain't gonna learn what you don't want to know"
The Grateful Dead
I bought a factory custom once - the Yamaha XS750SE. A great bike with sucky ergonomics. I should have kept the bike and changed the handlebars (they didn't have feet-forward controls, yet). But I was too anxious to get my first BMW...