I enjoyed the first episode too. However it did suffer slightly from me having just started reading the book the day before so I was very aware of all the changes. Nothing major, some necessary compression of the plot, a few dialogue changes and additions. My biggest gripe so far is that
I'm trying to remind myself that once I have a chance to step back I'll probably think it very faithful.
Strange should have red hair though. The BBC could have run to some dye or a wig surely?