Unfortunately whoever de(mis)signed that cooling loop knows little about what they are doing. 90° bends KILL flow. Unless he's running an industrial pump with a huge head rating (usually more important that max unrestricted flow), it's going to be no more effective than a simple Heatpipe HSF. Bends, 90°, small diameter tubing etc = all lead to slow flow, a stressed pump = loud as heck. It's a work of "art," at best, uber high maintenance with LEAK potential, and bacterial infection of the water (if he's not using a pre-mix or bactericidal).
Trust me, when it comes down to water cooling Vs Air = Water will win ONLY when you KISS it: Keep It Simple Stupid! Bends and shit and fancy connections and all that crap = eye candy = underperforms Vs high end Air, or a less complex flow path design. Nice looking, performs like mid-level air at best. And prob is a BISH to drain/bleed properly.