IMO, Super Metroid is without a doubt the best SNES game and one of the all time best games.
The game is replayable to an absurd degree and has the most freedom I've ever had in a game.
You can truly play this game the way you wish to play. An example of this is thinking "Can I make it here?" and being able to actually get to said point despite not having the intended power up to get to said place.
Each playthrough can feel completely different from the last depending on how you approach it.
In my most recent playthrough, I sequence broke so hard that I ended up fighting Crocomire with the Varia Suit and loads of Super Missiles and Power Bombs, decimating him with one shot.
However, freedom is not the only thing that makes Super Metroid as incredible as it is.
The OST is incredible, effortlessly immersing you into the world while being an absolute jam to listen to (ESPECIALLY Upper Brinstar when the music kicks in as you approach in an elevator).
The game also lets you learn things on your own and when stuff is told to you (Shine Spark and Wall Jumping), it is done in a very well "Show but don't tell" fashion. (This also applies to the story as well).
Samus in this game is very floaty, which may be annoying to some players and a gripe I completely understand. However, playing the game enough and it can be very easy to get used to.
There are many MANY more things I could discuss when talking about this masterpiece, but it would take too long lmao.
Long story short, this game is an absolute masterpiece that I cannot recommend enough.

The amount of time I (as well as all other Metroid Fans) have waited for this game cannot be understated. The expectations were absurdly high and were not only met, but surpassed. (Except for one thing which I'll get to in a bit)
Samus in this game is genuinely the best smoothest and most satisfying to control character I've played, incredibly snappy and responsive which is very important for this game, as it can (and will) require fast series of motions.
The map design is excellent and the difficulty is challenging but not rage inducing. This game also wraps up the Metroid Saga in an incredibly satisfying way. Running around and collecting items and finding secrets is super fun.
The only real complaint that I have is that the soundtrack is mediocre, especially in comparison to Metroid's otherwise amazing legacy of OST's (my favorites being Phendrana Drifts from Metroid Prime and Upper Brinstar from Super Metroid). The music is not bad though, as I never thought "Is there a way to mute the OST?" and the Red Soil Brinstar Remix in this game is actually quite good, but that is the exception, not the norm which is unfortunate.
A minor thing I appreciate is the Sequence Breaking you can do in certain parts of the game (namely Kraid's boss fight) which rewards you very nicely for exploration.
This is an amazing game and a must play if you are a Metroidvania Fan.