It's my go to digital EQ. I use it mainly for surgical EQ (tame resonances/noise in a track or surgically.
correct the mix) and sometimes for tone shaping (Only when I wanna be quick. Otherwise, my taste is to 4 bands analog EQ with no graphical display and rely on my ears only).
There are 2 main reasons I love it :
1°) High quality with low CPU usage : Better than basic daw EQ (soft sounding in the high frequency) with less CPU usage than most external Digital EQ. I found that only Fabfilter Pro-Q beats it when considering quality over CPU usage. This EQ cost less than 50 bucks ! that's amazing.
2°) ease of use : Click to create a band and depending where you click the nature of the band is different (in the lows or high, you got a filter, in the medium you got a bell, and in between a shelf).
Other than this : stereo operation, mid-side, AB and serial/parallel processing ! There is also a feature that allows to control all the instances of IIEQ from a window. It can be convenient for quick mixing, but be careful not to mix with your eyes .
There only downside for me is the stability of the graphical interface, that can be buggy on some daws/software (doesn't work on maschine, works pretty well in reaper) or laggy (multi-window feature can become laggy with a lot of instances)....But at that price I still rate it 5 stars .
I agree with the reviewers here: this is a great EQ, not just for the price but overall. Is very easy-to-use, "sounds" better than pretty much every other EQ I've ever used, and is actually affordable. All plugins should be $39...