TAv mode — do you use it?

I don't own a Pentax, but the TAv mode seems very useful to me, since it lets you control both DOF and motion blur at the same time. It's more convenient than full manual since you don't have to fiddle with setting the third variable, ISO, and since it allows exposure compensation.

Nikon also has the mode implicitly with auto ISO in manual. Apart from that I don't know of any brands that has the mode. Om my OM-D I can use auto ISO in manual, but I don't have exposure compensation.

To me TAv (and its Nikon equivalent) seems like the most useful mode of them all — so how much do you use the mode?