has anyone got a iphone x?

If you read through here there are many people who have received theirs. This is a user-to-user technical support site and your question really doesn't fit and is far too broad. Do you mean how does it compare with the iPhone 3G? That would be a previous model.

You could use Google and read reviews to learn yourself. Based upon a friends who got theirs on the first day it is much faster, significantly larger screen while being about the same size as the 6s, much improved battery life, far better looking screen that is easier to read, he likes FaceID much better than TouchID and he is impressed with the speed.