I bought this unit blindly, turned out to be quite an interesting unit.
But the effect is not subtle at all, which can completely destroy your mix balance. Luckily, I have an M/S unit before with 2 gain knobs and I can easily back off the "S" side before going though the SPL BIG.
I like the width and depth I am now getting.
I have not yet tried on synths and sound design, but I'm sure the effect can be really cool.
Just have to be very cautious on the mixbus. It really needs a gain control before.
In the end I'm keeping it, but it may not suit everyone.
The bass boost feature is a very nice +