I passed on this one on this round of sales, but I considered it - it was like $149 with 6 packs at AD or something like that.
The Sneap pack looks like a lot of amp sims + associated fx for them, so I'm not sure how those presets would sound with existing recorded amp tracks.
Those presets DO sound very nice, though.
I'm sure it's pretty good for a quick slam (kinda like the Pultec sim I always put on kick drums), but there were other things I needed/wanted more on this year's BF sales.
There is definitely a limited amount of adjustments for the fx, though, but much like EZD, it gets you to a good point with a broad stroke ...and that's the point of EZMix.