I've been off work today and have binged through it.
Absolutely awesome throw back tv with some clever twists and excellent casting.
TV/Film snobs will sneer at the obvious Spielberg influence - think ET v Super 8 - but otherwise it's been a gem of a find and luckily more or less green lit for a new series.
Yes, saw the last episode at the weekend and was pleased that the series fulfilled all its initial promise. There was some good acting (Winona aside): the girl playing Eleven (who's British incidentally) was extraordinarily good.
You're right that there's a lot of Spielberg reference but there's also a hint of Twin Peaks: both great influences to have.
Is there definitely going to be another series? Part of me wants one, part of me wants that to be the end. It was certainly one of the best things I've seen this year (and it's been a good year for telly)