In my opinion, this game could have simply been a DLC from Spiderman 1. Because they just wanted to introduce us to Miles and prepare us for Spiderman 2.
The main story is 5-6 hours which is really short for a game that costs 40-50€. I love the game and it's fun in terms of combat and there are interesting side missions and you really feel like a friendly Spiderman from New York who helps people with anything.
I played the game in 18 hours because I wanted to have it 100%, play it because you won't regret it, I enjoyed every second of playing.