I can't say I've been using it for long but it has quickly become a great channel strip tool in my music mixes. Ozone 5 has also become a great tool for me in mastering for music and post. I like how the Isotope plugs are layed out, very clean and powerful. Latency becomes an issue but is something I've just had to learn to accept and offset for when mixing music as I cannot stand protools delay compensation and mixing DSP and native on a strip makes it worse so I have been just staying native and slipping the audio the same samples as the delay.
Anyway, not sure if that helps, but yes, I've been using alloy often as a channel strip tool in music, not so much in post yet. I will say that the presets are real quick to drastically alter the color of your sound so I find myself trying not to go overboard with it.