Yeah they are consider the best mechanical keyboards before you go into Topre or custom keyboards ($300 Price Range).
At geekhack the comparison usually goes something like this:
BAD >>> Razer Blackwidow, Corsair K60/K90, CM Storm QuickFire Pro >>> Logitech G710, SteelSeries 6GV2 >>> Older Das Keyboard, Leopold, CM Storm QuickFire Rapid, WASD Keyboards, Ducky >>> Filco >>> GOOD
EDIT: Fixed.