With a little craftsmanship you can build a custom loop with a very unique factor. The NZXT Kraken AIO water cooling does not need to hide in comparison with individual CPU water coolers, but convinced with the offered performance.
In addition, there is the possibility to save the space for the pump, which is usually required. This certainly could be interesting for small PC projects.
We also like the additional features that are included: Water temperature sensor, fan control and a nice LED lighting.
Of course, a custom loop is still rather something for the case, where an AIO water cooling already exist and a custom loop is to be purchased. The AIO water cooling system can thus be used in a meaningful way.