I've now completed this game and found it to be very good. It also has a more emotionally driven story than the base game. It's pretty well written and voiced, and the gameplay is both challenging and forgivable with the enemy powers you face, and the powers you have. It has spectacular effects and the ending doesn't disappoint. I had read upon first playing it that some were calling it a bug riddled mess, but I only encountered very few minor bugs.
One thing I had a problem with a bit more so than in the base game was unintentional use of gadgets. It's mostly due to this game having more controls due to bindings for Venom Powers. However it was also my fault for not looking through the controls menu thoroughly. Next and Previous Gadget was bound to scroll Up and Down on the mouse. I have since deleted those bindings at the start of the final mission and don't have the problem anymore.
Note, one cool thing about this game is you can replay all main and side missions, crimes and social activities, once you beat the game. A few of these were captured as mission replays.
This is a mission where Miles infiltrates the Roxxon lab where Nuform was first developed to find Phin's lost phone, which has the info he seeks on it. This mission has a main character reveal, so spoiler warning.
This is a mission where Miles talks to Phin about her Underground gang and says he wants to help her. However she still has no idea who he really is, and what he really wants. She lets him join Underground, and he goes snooping.
This is a mission where Miles investigates how Phin plans to use Nuform, and plans to take it from her. This is where she finally finds out who he is.
Tinker Tailor Spider Spy
This starts out as merely an attempt for Miles to meet with Phin and talk, but Krieger has other plans. We also find Rhino, who's now working for Krieger, is equipped with a new suit that's resistant to Miles' "Zappy Pops", which of course has to be my new nickname for Spidey Miles.
This mission when I first tried it seemed very hard. I found the key to it is you MUST either lure or steer Rhino into a tank to stun him, otherwise it takes a LOT longer to destroy his armor. The 2nd phase is the hardest, but it's easier if you use camouflage to build up Venom when you need it, and toss the engines.
Thicker Than Blood
This is a fairly tough fight against The Prowler. He uses camouflage, and has some powerful attacks that are hard to see coming.
Like Real Scientists
After Miles finds a piece of the science project he and Phin made is the last part of her Nuform weapon, he seeks to take it before she can get it. Along the way you're transported back to the day all winning projects were on display via a flashback.
The Battle For Harlem
This is the final showdown between Miles and Phin, and she's not messin around. This is a fairly hard fight, but if you can manage to dodge her attacks while your camouflage is recharging, you can sneak in some easy attacks. It takes pretty good timing to attack her without camouflage, but if you manage to see her get her sword stuck in the ground amidst a TON of dodging, it makes it easier. I honestly did it mostly by getting the feel of her attack/stuck pattern.