I play m&k and its not clunky at all but you would benefit from having a mouse with multiple extra buttons. Unless you're used to using the keyboard hand for more than moving, running and jumping.

GOT is fantastic with MKB, just have to rebind the default keybindings as they are all over the place.

I actually prefer M&K over controller

Its excellent, the control scheme is very comfortable and even the UI changes depending on whether you're playing with a controller or KB+M. The only slightly weird thing is aiming your bow/throwables with Left Ctrl, but it makes sense since the right click is used for a heavy attack (and it might feel weird at first, but you get used to it pretty fast).

You can also assign a key to switch between walking or running, so you don't miss out on anything.

Every port from Playstation that i've tried works perfectly with mouse and keybord, god of war, the last of us, spiderman... i found this game perfect without rebinding anything, the only disgusting things is the ghost pose that is V + LALT and i find this awful.

Excellent. You can rebind everything too and really get everything customized to your liking.

It's perfect. Played for over 100 hours. No issues with input or camera control. Changed a few keybinds to suit me and no issues.

It's more than serviceable but could've been better imo.