I have experiences with many classic brickwall limiters. They are ok, for mastering etc. But you should use limiter also for every mix channel to ensure no one channel will be in clip.
But... Digital brickwall limiters harden sound, make it more shart, distorted, ugly...
Finally somebody (my beloved G-Sonique :-) made emulation of analog limiter as VST. Zener diodes are analog electronic components that can work also as limiters, in special analog circuits they are used for transparent analog limiting.
G-Sonique Zener limiter is absolutely perfect for naturall, analog limiting of every channel during mix. It do not produce any distortion, harshness, hardness... try demo and compare it with classic digital brickwall limiter you will be wonder-struck. It can be used also as mastering compressor because while it has analog sound it has also brickwall function (do not allow peaks to clip over 0db but it dont have typicall brickwall sound) but it is better for mastering of live music, for mix it is perfect for all genres.
If you want to make your mixes modern, loud and analog (according to current music trends) witouth using harsh/distorted digital brickwall limiter, try this one zener analog tool, it is something totally different with different sound :-D.