The length of the cargo area from the base of the back seat to the tailgate ion the Skoda is 756mm. The width of the cargo floor varies from 1445mm (at the back seats) to 1003mm (at the tailgate opening). With the rear seat in place, the Karoq has a cargo volume of 521 litres and, with the rear seat folded down, that jumps to 1630 litres.

First things first; make sure the Karoq is actually as big as you think it is/need it to be. The reality is that this is not a huge SUV and is really comparable with something like, say, the Mazda CX-30, while cars like the Mazda CX-5, Hyundai Tucson and Kia Sportage are all a size bigger.

Beyond that, the good news is that the car’s most problematic element, a seven-speed dual-clutch transmission has now been replaced on the 110 version with an eight-speed automatic with a conventional torque converter. And although the 1.4-litre capacity will ring alarm bells for those who remember the troublesome Twin-charger engine with the same capacity fitted to many VW and Skoda products, the unit in the new Karoq is less complex and doesn’t seem to suffer the same problems.

However, there are no blanket statements on this subject and your experience with your current Astra is proof. Given that many owners were appalled at the reliability of their Astras, you seem to have scored a good one. And the reverse can apply; sometime a car with even a great reliability record can throw up problems for a particular owner. Modern cars are incredibly complex machines and things can (and do) go wrong on a fairly random basis.

You’ve layed out some challenging requirements here. You’d like a small SUV with a bit of ride comfort and clearly a bit of performance too, given your question about the i30 N.
I think you’ll find the ride harsh on the i30 N, especially since you found the ride on the Kona harsh already. Keep in mind the i30 N is a hot hatch and has the suspension to match.
I find the Subaru XV has very nice ride comfort for the small SUV segment, but I also feel that you will be disappointed with the performance from its 2.0-litre engine. You may also want to consider the new Hybrid Toyota C-HR. The Hybrid drive gives it a smidge of extra kick and it’s a fuel consumption hero, too.
For a better blend of performance and ride, really only the Volkswagen T-Roc and Skoda Karoq are going to excel in the small SUV crowd. In terms of ownership both now have five year warranties, and you can (and should) pre-package five years of servicing on top at a discount.