Honest opinion from someone who's played it and bought it several times already.
The game is great, it set some standards as far as freedom goes with some things.
The main story line is kind of bleak, but the lore is extremely deep.
Game play is good, you have the freedom to be any character build you want, wanna be an archer, go for it, mage, go ahead, want to be a thief that dabbles in magic, no one's stopping you.
It's completely free roam, you can't climb mountains like in BoTW but you still can get about any where in the game in more then one way.
Game is still fully playable after beating the main quest, and after that theres still tons of side quests and mini story lines to witness.
Easily can burn hundreds of hours into it.