I really enjoyed the first episode, glad to see it seems to be being really well received online too
Spoiler:
The production values really are phenomenal

I love period settings so I really like how the scenes in the park really feel like an actual western
There was a fair bit of controversy about the Dolores' rape in the run-up to the show airing and it was the scene I was least looking forward to so I was pleasantly surprised it was kept off-screen and the show didn't feel the need to show it for shock value. The implication was more than enough.
The twist with Teddy was a nice way to introduce him (even though I figured he was a robot since the trailer showed him lying "dead" and obviously they wouldn't give that away but I still liked it as a narrative technique and I'm sure it was a great swerve for the people who weren't obsessing over every promo like I was

).
I also love how creepy it looks when they start glitching and when they're stopped mid-action. Also the little stiff movements that old retired one made, it's all just really well-done.
That final shot of Dolores swatting the fly was a perfect little omen, I'm here for her going psycho on the more deranged guests.
I adore shows that are really mysterious and mind screwy and full of opportunities for theorising (well my username's Lostie so obviously) and there's already a lot of discussion and theories floating around so I can really see this show being something I get really hooked on.
The promo for the rest of the season looks amazing