I never said there's a universal cover la Hanis. Have a read again! I said I replaced my Halford cover with another Halford cover. And I replaced the cover because the old one was covered in puke, urine and because of that the sponge inside disintegrated. Replacing it just made it more comfortable for my kid and yes, I did check the expiry date of the seat and was well within the limits.

Halford makes replacement covers for their different models of child seats so each replacement cover is a perfect fit for the chair you're using.

My bad if I wasn't clear in my response.
An ideal seat when locked down shouldn't have too much (or none at all) side-to-side and forward/backward movement. This Pebble in the video seemed quite rock solid.

Different cars have different isofix points. Use whichever your car has, there's no "right" or "wrong". If your CRV has isofix in the middle seat only then use that. All depends on your car.