I have not played it yet. I played the original and sucked at it, and I played Primes 1 and 3. As somebody who specifically likes Mario/Kirby style platformers and has little qualm with the idea of backtracking (I like nonlinearity in games) but can get somewhat lost between game sessions, what should I prepare myself for?
Well if you played the original, its pretty similar to that, only better in every way imaginable. The original had a great premise, but a flawed execution. The rooms all looked the same, there was no map, no easy way to replenish health, and the bosses and interesting challenges were few and far between. Super Metroid fixes all of this, while adding better controls, more interesting weapons and tools, pretty and varied graphics, and a fantastic soundtrack. I would say if you like 2D-games, you will probably LOVE Super Metroid! Looking forward to see what you write about it when you get to it!