I strongly advise against this chair. The workmanship is lousy, it is ugly and unevenly painted, it breaks at the drill holes when you assemble it. The seating comfort is subterranean and the adjustability of the children's table is only possible by means of a hexagonal nut and only in one position. An outrage for the price

On gravel the wheels are too small for comfort...Otherwise quite good even on bumps, even without suspensions....

The universal rain cover from Migros fits. https://www.migros.ch/de/product/747228200000

It was not included when I bought it. I had to buy separately.

Yes

Not really. I'm sure it's a rubber coating, but I think there's hard plastic underneath.

Yes, the seat position can be fixed in several positions, even when the child is sitting in the pushchair.