warm km84 sounding is NOT what I use to describe them. They do share some characteristics of the 84's, but more closely resembling the 184's to my ears.
They are VERY bright. Too bright for my tastes, but they do work really well on mandolins and drums. For live taping, they do the job for a good price, but you would need to get pretty close with them to sound good as they have a very open pattern and would essentially be considered a sub-card.
For the price of a used pair, they would be hard to beat in specific circumstances, however, I personally would not consider them a good all-around type of mic for every occasion. Only Schoeps can claim that~!, kidding.