Liechtenstein tips?

Blink and you'll miss it. Really, if it is not very much out of your way, like across the river while you're driving down the A-13, then sure, why not. Otherwise I would not burn an extra liter of fuel, or a precious vacation day to go there. It is pretty much indistinguishable from the surrounding countryside. But it is a part of Europe.

We stopped there to have our passports stamped. It cost us 1 Swiss Franc.
It is a little interesting, but not worth going out of your way. There is a castle there, but you cannot go into the castle.

We stopped in on our way to Chur, solely to "check it off our list." We were spectacularly underwhelmed. An industrial / commercial city, gridlocked with traffic. That was only 15 minutes off our route, but still a waste of time.

There are other answers in an almost identical check the box question from about a month ago.

https://community.ricksteves.com/travel-forum/switzerland/best-way-to-liechtenstein-from-zurich

If you're someone who needs to go there to say you've been there, then do it. No, there aren't a tremendous number of sights to see. But Vaduz is a pleasant town to walk around. I had a casual couple of hours there strolling around, getting a coffee and a roll, and could not have been happier. I took the bus around instead of driving, and to me, the country looked very much like Switzerland did on the other side of the Rhine. Not a thing wrong with it, just not particularly remarkable. And if that's what you're looking to get out of it, plus to be one of the few travelers who can genuinely say they've been there, I think you're just fine.

I have been to Liechtenstein. I had my passport stamped there. I took a quick tour of Vaduz and ate lunch.

I'm not sure that there's anything else to do there (outside of the passport stamp & lunch), but I was happy to be able to say I've been there.

Thanks folks. I think we will jump across the border only if we're passing by and have some spare time.

That said, Leichtenstein is the home of my favourite turbomolecular vacuum pumps - something from my working past.

Yes, I can be that boring ;-)

It is also the home of Hilti Tools. Their rotary hammer drills were so prevalent that we just called them Hiltis. As in "Anybody got a Hilti?"

Do they actually make those pumps and tools there or are the companies just registrered there because it is a tax haven?

In the case of Hilti, they were founded there in 1941. Of course they now have operations all over the world.
https://www.hilti.com/content/hilti/W1/US/en/company/about-hilti/company-profile/history.html
They've got a very large factory and headquarters in Schaan with its own train station,
Forst FL, Hilti Bahnhof

Thats interesting, my perception of Liechtenstein(and the other Micro Nations) is that it survives as a tax haven, so it’s good to know they actually produce something. Not that it would be a reason for me to visit, even if it was a company in my field :-)