The website looked different in the past. I am not even able to enter a discount code which I got when the mixer was founded.
The previous domain owner preferred to close the service, he was running it with his own money to cover expenses IIRC.
The mixer had been operating for less than a year before it was closed. Bitwhisk mixed only 3 BTC in that period of time with a much lower mixing reserve.
Me too, trying to make some indepth research but I cant find any reviews which its hard to make comments about legitimacy.
I used it 2 or 3 times for small amounts a year ago. I also did a translation for Bitwhisk and got paid without any problems. However, I did not leave any feedback.