The first thing I need to say is that this is not meant to be for a lot of accessories or if you use a secondary head strap. It works with controller grips and has space for the power cord and some prescription lenses.
This is something I will be using when I need to transport my Quest 3 and place it in a suitcase or another bag. And when I don't need to use my battery head strap or anything else.
The material is very soft inside and cushions the headset very nicely.
Overall it is well made, it is just small and not meant for any extras.
You can use my promo code "BRIANSLOAN" for an extra 5% off as well!
Find my full review of this case here: https://youtu.be/NQ3jO3KN7OU

I specifically asked Kiwi if it will fit my H4 Boost Strap, they said it “should”. Well, I can only barely fit it in disassambled, tetrising it all together inside and the case becomes round and hard to close. Now I need to assemble-disassemble the H4 Boost Strap every time.
I really wish it would fit entire headset with H4 Boost strap so that you can also fit the mini-case for controllers inside

I really like the case but even though Kiwi said the Q3 with their Comfort Strap on it would fit with this case it absolutely will not.