I've played a few rounds today and so far I really enjoy it. It's like a less frantic Nuclear Throne but it's pacing, art and style seem quite different. If you are looking for a new game to play, head over to Epic and get it for free right now.
https://www.epicgames.com/store/en-US/product/enter-the-gungeon/home

I got the special edition with the Ammonomicon. Have yet to play it, but the book is worth the price.
What platform?
PS4
I added it to my Epic Store library today. I found this news earlier on YouTube. I'm interested in knowing what others think about it. I haven't played it yet.