I really enjoyed The Girl Before - I hadn't read the book, but I thought it was sleek and classy and well acted. Plenty of twists and turns, red herrings and surprises. It was a little far fetched at times but it's a work of fiction and a bit of entertainment so that didn't bother me at all.
I didn't pick up my phone once during any of the episodes so to me that's a sign of a good drama 😀