There was a re-post of a old writeup by Sri K.S Kalidas about them.
http://srutimag.blogspot.com/2017/05/ge ... -next.html
After I went thru this, some Google Intelligence pulled up one of their concerts in youtube:
https://www.youtube.com/watch?v=VX6rsBtH49g
And the rest followed in youtube.
https://www.youtube.com/watch?v=qkfVx6o-TEI
https://www.youtube.com/watch?v=6B9_NURhvqE
All with many heavy hitters - rare compositions. In the last one rama nannu brOvara - a very effective rendition. Only thing I noticed: they seem intent on pronouncing the svara - the consonantal part too stifly. They could add a bit of drawl, like Ramnad does, to disproportionately increase the vowel sound a bit more and also slide into da and pa in Harikambodhi - instead of a sharp land. May be they have to get comfort at this speed.. or may be those things are out of fashion.
But the sisters are a two to reckon with. Haven't seen recent concerts with reviews.