I just got a Foffa Nuvinci Black. I had to order it sight-unseen because it's a very uncommon bike. Apparently, effectively only available special order. I was able to snag the Black Friday deal that Foffa did on it, which made the bike even sweeter!
My first impressions...
It's not nearly as heavy as I expected. The gearhub is one of the heavier on the market, at 2.45kg, nearly a whole kilo heavier than an Alfine 8 at 1.59kg. But even with that, it still feels lighter, at 12.5kg, than my previous hybrid (and it is, but only just barely, my previous was 12.7kg).
The shifting, if you can call it that, is great. I find myself tweaking it all the time, but that's what you'd expect. It's really nice to be able to shift under load, and stationary.
This morning, on the first ride with a trailer, it felt a bit sluggish. I'm not sure if that's something to do with the transmission not liking the extra load from the trailer, or if it's just that there was a headwind this morning!