it's never going to make pics like the 105/1.4 but for what it's supposed to do and at 1.2lbs I'm interested....I would have rather it been a 24-120/4 but I need something native for my new z6
Indoors and under lights, where you need a FAST lens, it will be BAD.
I realize that adjectives such as bad and fast are relative, but I really don't think it would be all that bad. The reason is that you can pump up the ISO. It's fascinating for me to see all the raves about how effective the high-ISO performance is these days, yet it so often tends to be ignored for the people who feel they require a lens that is one to two stops faster. I rarely shoot in low-light situations without a tripod, so maybe my lack of experience with low-light handheld situations is showing.
I never think of lightweight travel. I've always taken the same lenses with me for travel as for all other times. I've been very fortunate that weight has not been an issue for me.