Yup, you gotta follow the rules.
I checked a flight between two of my favorite Eastern European cities (Budapest and Kyiv). Nothing draconian here:
For 18,390 HUF ($64)
Changed! Free carry-on bag (40x30x20 cm) in the cabin, placed under the seat
Online check-in up to 2 days before departure
For 26,026 HUF ($91)
Changed! Free carry-on bag (40x30x20 cm) in the cabin, placed under the seat
Trolley Bag (55x40x23 cm) in the cabin
20 kg checked-in bag
Free seat selection, excluding front row and extra legroom seats
Priority Boarding
Priority check-in
Online check-in up to 30 days before departure
Free airport and online check-in
For 30,770 HUF ($107)
Changed! Free carry-on bag (40x30x20 cm) in the cabin, placed under the seat
Trolley Bag (55x40x23 cm) in the cabin
32 kg checked-in bag
Free seat selection, including front row and extra legroom seats
Priority Boarding
Priority check-in
WIZZ Flex
Online check-in up to 30 days before departure
Free airport and online check-in
Flight Information
Refund to WIZZ Account