Finished Looks
The neutral black and gray color scheme of the H150i Pro makes for a clean and elegant cooling solution. While it does have RGB LEDs built into the pump block, they can be turned off via software to keep things subdued. If you want more flare, you are free to select any color you want. That said, if you are looking to buy this unit, you are likely doing so not just for performance but the LED bling as well.
Overall, it's a good-looking unit. I myself am happy to see the square radiator vs. the more rounded options available as it just looks better. The inclusion of Corsair's popular ML series fans means it is likely to prove fairly quiet due to there being no bearing noise. Honestly, there is a lot to like if your case can fit it.
As with most liquid coolers, clearance is exceptional. There are no obstructions around the socket to speak of. System memory is not limited by height, nor is the choice of GPU on Mini-ITX systems, which is typical for all-in-one liquid coolers, and the Corsair H150i Pro is no exception.
As can been seen here, making the Corsair H150i Pro match any system theme is not a problem. Any color imaginable is available due to the RGB LEDs and Corsair Link software.