I've been reading the Onslaught saga this year, so this is the culmination of a few month's reading. This volume is a pretty good conclusion, even if I don't understand the reasoning behind the plot completely. The art by Adam Kubert is pretty good, and the writing by Lobdell and Waid isn't bad, either. This comic also serves as an intro to the Heroes Reborn event that takes place in Fantastic Four, Avengers, Iron Man, and Captain America Volume 2. The 4 titles were rebooted and this comic explains how they were reset. When I first read the Onslaught story, I wasn't a big fan, but repeat readings have revealed it as a suitable enough crossover. If you forget the implausibility of the creation of Onslaught and just go with it, it's a pretty good read. Some comic book science and a little convoluted continuity that X-Men is famous for create a formidable villain in Onslaught. 3 stars for the Onslaught epic overall, too.
My most recent reading of this comic is for a Hulk readthrough, and this does have a bearing on Hulk's continuity, as Banner lives in the Heroes Reborn Universe for a year in real time separate from the Hulk, who continues to live in 616 Marvel, as a result of the events of this issue. Jean Grey turning off the Banner persona seems dubious, but it was necessary for the plot. Adam Kubert would late become the regular artist on Hulk.