I thought Sunday's episode (which I watched last night) was excellent - so chilling and atmospheric.
For me, part of the enjoyment is in watching how the book is being re-interpreted for a 2017 audience, hence wanting to compare it. I thought changing the biscuit scene worked very well, because it reflected the theme they're pulling out about 'choice' and co-ercion - June keeps herself psychically together by making the 'choices' that she has to make to stay alive whilst taking whatever opportunity she can to demonstrate to herself that she hasn't been subsumed into the new regime.
'Don't you forget about me' at the end made me cry - it spoke to June remembering her earlier self, Ofglen (the one she'd got to know), Moira and of course Hannah, but it also made me think about Hannah who might well forget about her birth mother, and Janine's baby who would never know.
When I first read the book I was of an age to have been a handmaid, and I think I read it from that perspective. Now my DDs are of handmaid age and I'm watching it thinking about how they would respond in a misogynist, totalitarian regime, and what their lives would be like. Doesn't bear thinking about.