I had bought a Rondo Viola C string a while back to try out - just put it on Edgar a few days ago.
My 1st impression - immediately liked it!
Very similar in full sound & very quick response to Larsen Virtuoso Soloist, but not as bulky. Similar in price - really need to find out which brand lasts longer.
...just ordered a D & G Viola strings to try - hesitant to try the A string because I generally don't like steel core strings.
Btw, I am disappointed that hardly any string manufacturers to go the extra effort to develop a good synthetic core A string for Violas.
Think I'll even be trying the Rondo Violin strings on Mortimer - when I get back to playing on him.