Skoda superb question

did you have any luck with the three child seats?

I had a Mkii Superb (2015) rental in Iceland a few years ago. I have 3 kids, who at the time were 3,3 and 7. The two 3 year-olds were in full Britax child seats on the outside two rear seats. There would certainly have been no room for another one in the middle. We had a BubbleBum inflatable booster seat for the 7-year old in the middle, and it barely fit. She herself was comfortable. It worked fine, but that BubbleBum seat has a way smaller footprint than any other booster that I've come across.

I have a Mkiii Superb (2017) now, and the same 3 kids, but 4 years older. The youngest two are in these Miniuno boosters from Smyths, which are the most compact regular booster seats I found when I went looking a few years ago. The eldest is 13 now, so doesn't use a seat, but she can sit comfortably in between them. I've tried three of these Miniunio seats across the back, and it's possible, but difficult to do. If you had three of them, there's no way the kids of any age would be able to open or close their own seatbelts. It would have to be done (with difficulty) by an adult. It would be the kind if thing you'd do once in a while if you really had to, rather than an every-day occurrence.

The Superb is a pretty wide car, so I don't know if any other car with a bench seat is going to really offer the ability to practically fit 3 individual child seats. We've a Ford S-Max too, which has three independent seats in the back (middle row, since it's a 7 seater). It'll take 3 of pretty much any child seats in the back. In fact, with the rear seats in place, it'll probably take 5. But that's the advantage of people carriers over cars in this particular area.