My opinion FWIW.
Looks - totally subjective, some think it looks drug dealer, some think it's looks good. Each to their own.
Function - dark (90%+) tints are excellent if you have really young children/babies. I've had them specced on my two previous cars. But as the kids get older (normally when they hit 4 or 5) the dark tints can restrict visibility. I specifically didn't spec them on mine as my Son had said on my previous car that it was hard to see out (other cars, he's car mad!) as we were going along. I was worried the 65% would be too light, but having had the sunny days so far, I think the 65% is a good balance of keeping strong sun/UV out but keeping visibility high.
Or, to add another option to the mix.... back in 2016 I got a MK7 Match Edition for my then partner which we used for second car duties, nursery/shopping-kart etc. It didn't have any tints (it was a cheap lease deal from stock), so I bought the 5DR MK7 sunblind kit from VW...
... what I can tell you is it surpassed all my expectations, it was/is absolutely brilliant! Not only does the kit fit perfectly (it literally clips in in just a few minutes!), looks seamless, offers good sun/UV protection, but it also allows the rear windows to be used/open whilst fitted, and can be removed easily and used in another car or sold on at a later date.
I still haver the kit (removed it when the car went back at the end of the lease) and although I don't think I will use the rear screen blind, I might put the side blinds in when we're in the peak of summer and I'm taking my two kids around.
Part number is 5G0064365 and they're about £170.