I just received a Ledger Nano X, and I will take this opportunity to share my first experiences. What I first noticed was the difference in size compared to the Nano S, new model is not only bigger but also heavier and thicker. It's not something that can be annoying if you carry it with you somewhere, but the difference is definitely visible.
The other thing I noticed when opening the package was that Ledger seemed to listen to some users' complaints (I have mentioned this several times in the forum) and that all instructions come in as many as 11 different languages which is great in terms of security for new users who do not understand English. They also include 3 recovery sheets, USB cable, a few stickers and keychain strap which is much better quality than the previous one + more detailed Getting Started + Use, Care and Regulator Statement.
There is definitely an improvement in the quality of device design, the way customers are approached in terms of package content, and in my case very fast delivery (only 4 days for EU) and free shipping with Black Friday 35% discount. I can only say that as a customer I am completely satisfied with the product and service.