I attended the MGNOC National meet up a few years back in Oregon. The NTX had just come out and Guzzi had test rides on the Stelvio NTX and others. I spent about a 1/2 hour on the Stelvio. It was really OK, not great, but pretty good, better than I though it would be ... but the following year (can't recall) Guzzi made several significant improvements to the NTX and follow up model was MUCH improved according to reviews I read.
For such a big heavy bike it felt pretty good and I could actually ride it at only
5'6". Moving it around was a PITA and on dirt I had to be careful. But once moving it was fine, did everything pretty well, IIRC. I only actually rode it on paved roads and had minders with us. (but they kept a good pace!)
NTX was pretty smooth & torquey ...hate to say it ... but a back to back ride with a BMW R1200GS ... the GS wins by a mile for several reasons on several levels, IMHO.
Like many Guzzi's, they are a true acquired taste. I've tested MANY brand new Guzzi's (not the NTX) and always hated them at first but longer I had them/rode them, better they were.
This true especially with the Guzzi Griso I had. (see my Avatar)
One of the Glossy mags had that Griso before me and had it set up for track use. It was truly terrible on the road. But after a few days of fiddly suspension adjusters it just got BETTER AND BETTER. It positively shredded Matole rd. and highway 36. Impressive ... once I learned how to ride it. (not easy!)
A fellow editor and I got two Guzzi's for a couple weeks. Took a 5 day ride up to Trinity Alps. I wish we could have had the NTX instead of that clunker Norge we had.
I would imagine the NTX would need a "period of adjustment" as well and probably would make MANY riders happy ... if they can learn how to ride it.
FACT: Guzzi's are weird ... like not other bike made!