It was... really good!
Honestly, felt like a breath of fresh air, I'll explain later why.
Jodie Whittaker is great as the Doctor. Haven't quite picked up on her unique features, gonna watch a couple of episodes tomorrow to get more of that. Out of her new companions Graham is my favourite so far. Ryan and Yaz are fun, but I need some time to get to know them.
The villain felt like sort of Doctor Who meeting the Predator which is a really fun idea. The villain was imposing and felt like a threat.

Now, about the breath of fresh air.
Even though I'm very positive towards NuWho, there is one thing that makes me prefer Classic Who over it. And that is - pacing and music.
The new episodes (even the good ones) often tend to rush things - the pace of the episode just keeps accelerating, going faster and faster like a runaway train, and the music just keeps blasting into your ears. Murray Gold is good, but one gets tired (that's also one of my problems with the Fifteenth Doctor era - it keeps rushing and always has music that often distracts me).
While Classic Who doesn't hurry. It takes its time to establish the characters and setting, and doesn't have the music blasting into your ears. Even when the episodes get intense, they are FAR from the NuWho ones. Classic Who is more relaxed and doesn't bother.
And I see why some of you said that 13's era has a classic who vibe, and I felt it in this very episode - *The Woman who fell to Earth* does happen really fast, but at the same time it doesn't feel rushed. It's calm and hasteless - it doesn't try to outrun a train, it takes its time. And the music, which is very good I must say, is dark and imposing, yet not loud. It's subtle, and that's what makes it stand out.