Well I have just bought one! A 2016 4Motion 6 speed. Not had it long but am very pleased with it, pulls like a train or at least in comparison to my 1.6TDi Passat Estate it does!
If it is a 2016 180 I think it will be the last of the EU5 engines which is the same as mine. I am happy not to have to bother about AdBlu, makes life simpler but the downside is slightly less power than the EU6 204 and slightly worse economy (offset by having to buy AdBlu).
The power I am not bothered about, the economy would be nice but unless I have to drive into one of the new stringent emission control zones in the future I can live with it.
I am getting about 35mpg average (calculated on receipts) in mixed commuting about 25 miles a day. You would be slightly better if you have a longer smoother commute I guess.
If its a Kombi with sliding windows check it for leaks, pretty easy to get replaced on VW warranty if you have it, not the end of the world otherwise unless it's not been noticed and has wrecked behind conversion furniture for example.
On the engine front I believe the earlier versions of this engine had a problem with corroding intercoolers that sent aluminum oxide into the engine air system and wrecked the engines big time. A 2016 should be OK and I was advised by VW that this was the case.
Others on here may know more about that.
The other thing I learned is that the standard H4 headlights are pretty crap but its midsummer in Scotland so its not actually going to get dark for another three months by which time I hope to have H7's.
When I did my research I found you could get a Warranty Direct policy for three years pretty cheap, might be worth it if you get a private sale, I think the engines are pretty expensive to fix.
I am really enjoying mine, it will be a camper when it grows up