I really disliked it.
For a sci-fi show with a young audience, it spent the first 10-15 minutes being a soap-like meander through Bill's life. Why the info-dump? My eldest was bored ("when is something going to happen, dad?"). It was lazy and the information could have been seeded through the whole running time to let the episode start with a bang, not a whimper.
Like a lot of Nu-Who, it was also lazy and riddled with simple to solve errors.
The Doctor seemed awfully unfussed about sentient fuel that was a match for Time Lord technology. Why?
And if that's the fuel, what could the ship do?
Y'know, the ship that the Doctor realised had landed in London but chose not to investigate.
What was the story of the girl with the golden star in her eye? Was she human (I thought not at first, now I don't know)? Was she a lure for Bill? How did she come across the puddle? Why did she keep going back?
What was the point of having the puddle be shown as a screen with a waving alien hand behind it talking about the Pilot and Passenger? If it was to create a mystery for future episodes, then it was clunky and distracted from the soft-reboot. If it wasn't, then it was clunky and unresolved.
Still, I didn't know about John Simm until the reveal at the end of the trailer.