I have built quite a few Waterchill systems, they were reasonable good performers. But Asetek had BIG problems with their pumps, the electronics just died. I had to replace all Waterchill Xtreme combined pumps/reservoirs because they died. Same with Waterchill Xternal - pumps just died.

Waterchill did also use BlackIce radiators and cheap noisy inneffective fans, hoses are very stiff. And if you don't cut the hoses correct or don't stick the hoses far enough into the couplings - it will leak. A LOT of people had problems understanding when the waterline was far enough pushed into the coupling.
~ 5 years ago Waterchill were "good" - if they still make them as they did I wouldn't buy one today. I think a review today would slaughter the kit you linked to killerxp100

Asetek also make the NorthQ 3590 Siberian Tiger II kit and Corsair H50 Hydro Series. I wouldn't get chocked if reports on dead electronics starts emerging on these kits