I would have to disagree, at least in part. AIO units are prone to leaking because they are massed produced products. (One exception would be Swiftech's AIO units. They have a much higher level of QC.) Now custom loops WC setups are an entirely different animal. The ONLY time one will leak is if the owner selected cheap parts and/or did not take time to ensure a proper installation. I currently have 2 rigs with custom WC setups and have never had a leak issue. My gaming rig has had 3 different WC setups (x1 Swiftech AIO & x2 custom loops) with two different WC GPUs.