If you want storage under both front seats, and don't want to buy and fit the official add ons, I can recommend simple Ikea Drona boxes which I've been using successfully for around a year.

They don't slip, and fully utilise the space under the seats (hold just over 6.5l each). I use them for snacks for the kids, and a box of tissues etc to avoid cluttering the cabin. They fit perfectly.

These ones on Amazon if you don't have an Ikea nearby.

I should probably point out I don't have electric seat adjustments which means there's room. I'd guess if you do have that, there wouldn't be room for the storage.

Hope it helps someone.

Edited 24 September, 202524 Sep by andy230uk

How does they fit ?? Do you have a photo

They basically just sit on the floor beneath the seat. Wife's out in the car at the moment but can upload a photo tonight

8 hours ago, EduardDo said:

How does they fit ?? Do you have a photo