I grabbed Metal Guitar Gods 3 yesterday. It threw me a little.
For one, most of the presets are named very descriptively so that you know what amp was at the heart of the signal chain being modded. That's great! Most of the other packs have vague preset names like "Heavy Machinery" or "Main Rhythm 1", which is fine if you're ok with auditioning a bunch of them and only going by ear to find how it'll fit in a track. I prefer knowing that Adam D modeled his Framus Cobra or Soldano if you're going for a specific vibe.
Speaking of Adam D, I'm not really a Killswitch Engage fan, but I think his healthy collection of presets here are probably the best heavy amp models Toontrack has ever done in an EZMix pack. The Soldano and Framus Cobra patches sound sooooooo good for chunky rhythms that cut. Man, can he dial in a tone. Great lead patches too.
The Andy James ones are also great, encompassing several 5150 patches which all sound good, and a handful of Dual Rectifier, Blackstar Series One and Marshall patches. Very balanced across the range, along with good leads.
The Keith Merrow ones are unfortunately of mixed quality. His Friedman patch is crushing and great, but some of his other rhythm patches sound pretty anemic by themselves, especially the Conquering Dystopia 5150 one. They'd probably cut through in a mix, which I guess is the point, but I'd prefer a bit more meat on them as the default, and letting us tweak that as one of the two parameters. That being said, he provides a surprising number of ambient clean patches, and they are fantastic.
Finally, the Ola ones are not my cup of tea at all. Only one or two straightforward rhythms, and I find them to be mostly fizzy and undefined. Will probably never touch them again.
Overall, the unexpectedly great and diverse set of ambient clean patches along with the Friedman, Cobra and Soldano sims make it very much worth the purchase. I just wish they'd release an overall set that had the same quality, variety and utility as Jocke Skog's Metal Amps. That's still their best. This is the best of the Metal Guitar Gods series.