Better than Vol 2. Starts Off Well
The book starts off with an awesome fight with all of the heroes. Then the EMP from Vol 2 is set off. Looks like the books in this collection are ever so slightly out of order. This happens a few times in this volume. You find books rewinding time a few minutes and then dealing with stuff up to the present. It's hard to realize (as I read in one of the late comics in this volume) that only a day or two have passed since this started. Imagine back when Onslaught was going on month-by-month.
X-Men 336 starts off awesome and finishes strong. Cable 35 is an awesome issue. Cable, Invisible Woman, and Apocalypse have to call a truce to try and attack Onslaught. It is full of raw emotion, drawn well, and just works. X-Force issue is one of the weakest (but not the weakest) issues. Going forward it's cool because all the team members have bonded. They get to see each others' fantasy worlds (not sexual) and so grow as a team. I loved Caliban's fantasy where he's essentially Superman. I'd like to think the guys at DC appreciated the nod. X-Man 19 is and interesting back and forth between Sinister and Nate. Lots of people end up holding the idiot ball. Also, did Threnody's captors leave her on her own to go have sex because it was the end of the world? That seems to be what was implied.
Hulk 445 was good and continues to show how Onslaught can mess with everyone's head. Iron Man #332 is overall pretty good. It continues the storyline of the Professor X armor. Has a good ending. Avengers #402 shows them helping out NYers. I think it's kinda ridiculous for Captain America, a WWII soldier, to say "So much chaos and destruction. I've ... I've never seen anything like it."
Thor #502 was interesting, but pointless. It could have been removed and nothing would have been affected. IT is the most pointless book in Vol 3. Wolverine #105 is mostly pointless when it comes to resolving the Onslaught story. But it helps Wolverine reset after Onslaught to be more man-like.
Finally, why is Storm on the cover? I don't think she's even in this book. (She might be in the beginning and I may have forgotten) It should have been the Avengers - they are the main characters