These plugins sound great. They are without a doubt the most realistic software emulations of analog hardware compressors I've ever heard. However, like all UAD plugins, they really slow down my workflow in Pro Tools because they can be a bit tricky to set up with a mouse alone. Not being allowed to enter numeric values on the pots, no undo button, and no easy switching between the three models can really make it difficult to compare different settings. Being able to punch in a number on the pots and a feature to allow switching between the 3 different models with a click of a mouse would be welcome additions.
I haven't bought UAD plugs for a very long time, for serious reasons about the UA business model (plug ins are getting way too exp.). I did some real time FFT measuring of the mkII. They ad some nice harmonics in the lower frequency range- 100 hz and below. Tried the blue stripe on vocals. I can put tons of reduction on it and it sounds very good. They have way more character as the old version. You could improve the GUI e.g. black buttons on a dark blue ground? I still don't throw my HW out of the window. Improve the usability (mouse use)! Sometimes its tricky to find the right setting. It would make a great bundle perfect! PS: I also was impressed by the TAPE-SIMS but for a plug-in too much $..