I had some hesitation about watching this as wasn't sure I'd like I'd like the fantasy side of this. Boy was I wrong!
Goblin, or Guardian: The Lonely and Great God is a brilliant love story across the ages.
The all start cast are superb headed up by Gong Yoo (Train to Busan) and the delightful Kim Go Eun. Their dynamics are perfect. The second leads of Lee Dong Wook and Yoo In Na are brilliant as well.
If like me, you had reservations about a fantasy style drama, put them to one side and watch this drama. You won't regret it. My heart however, really does it - it actually ached in certain scenes/episodes but I think Goblin is a right of passage for a kdrama fan and especially like me, you're new to this genre.
It's not perfect however - for the reason given above re heart pain - I'v e marked it down on rewatchability but don't let that put you off. I'm a big softy.
Secondly, let's talk about product placement - it's hilarious but annoyed some people. I didn't mind but it's the most obvious I've seen in al the drama's I've watched.
All in all - watch and enjoy. With hindsight I shouldn't have binged it in a few days - no wonder my heart hurts!