I was initially a bit skeptical concerning the performance of this product, but I still gave it a shot and I'm so glad I did!
This works much better than my old pillow/blanket solution, and as it is perfectly sized, it stays in place : no more need to adjust all the time, and no more evolution of the sound.
Performance is amazing too: I still haven't decided which configuration works better for me, but the possibility of removing some parts really changes the sound. I suppose I will have one setting on studio and one for live performances.
Excellent product!