I don't know if I would call it too big but it takes some getting used to. The experience it gives is second to none though. I likely use it more in landscape. Im still in the process of finding my use cases for this device and only 3 days owning it now, Im already starting to see what they are. I just got an awesome kickstand case for it, it's built like a tank. It also costed me $150CAD, it wasn't cheap. Watching content on it destroys the ipad, no more black bars, there is no going back. It's like a movie theatre screen in the palm of your hands.
Taking notes on it is an experience for sure. I will give Apple credit, I prefer the feel of the Apple pencil in the hand as I find the S-pen too narrow for my liking. But the feel on the glass, I find both equally satisfying. Maybe a bit more for the S-pen as it feels more natural but the Apple pencil tips don't wear near as fast as the nibs do on the S-pen. And Ive never had any gripes about the plastic to glass feel and sound. Tablet experience, it's darn tough to beat what the ipad Pro 11" gives. Im just such a fan of that size and form factor for pure tablet use.