Same here. Coming from an iPhone X this is a great upgrade, and I already loved my iPhone X, hence why I had it for 3 full years (since launch day).
The iPhone X certainly wasn’t slow or anything, but the battery life, much MUCH better camera, and overall beautiful design is a very welcome upgrade on my new iPhone 12 Pro.
EDIT: I should add that 5G is a mute point for me right now (no 5G in Austin, TX... go figure), but everything else about this phone has been awesome... and the new A14 Bionic is noticebaly faster than the X‘s A11.