It honestly feels very well built compared to other AIOs; it has more mass to the CPU block and pump unit than most, although likely due to the acrylic components used for the top (rather than lightweight plastic).
The reason I didn't rate it higher was the lack of software for control (like iCUE or CAM does) as part of the cooler's included features. It also was listed a bit higher on the EK site as part of a pre-order, so originally it showed $132 vs an initial $119 release price, back up to the $146 it apparently shows today.
For price and performance, you could get a Corsair H100i RGB PRO XT that comes WITH software controls for nearly $20 less.
The EK does look far better, aesthetically though, but it is difficult to recommend it as much as the Corsair when all it does is look prettier while the Corsair is the cheaper, equal-performing alternative and provides a full software suite.