One of my most fascinating gaming experiences, and I never would've expected to like this as much as I did. Incredibly simple, and yet fun and smooth to play. Discovering the secrets of the world and progressing isn't as cryptic as other NES games (like the original TLoZ), and actually feels incredibly rewarding and satisfying, and overall aside from maybe the Erdrick Mark thing near the end (which is handled kind of poorly and had to look up if I was right [I was]) the game is in my opinion completely beatable without a guide.
It's also simply fascinating to see where a whole genre started, and the game isn't even as grindy as I expected it to be (I only did it twice in my whole playtrough).

My only complaint is how out of place character sprites look in the port, they just don't look quite right. On the other hand, the orchestral soundtrack and battle artworks for enemy are both beautiful.
I think for the price (5€, often on sale) this is an awesome little experience that everyone who likes JRPGs will enjoy.

I have a feeling in a couple of months I will have played this even more times than the Dark Souls games.