Be aware. There is air in the reservoir, it's a sealed system, but it's not 100% full, this allows for pressure variations with heat and expansion etc. The cpu sits about 2/3rds the way up the case, the top of the reservoir will be barely higher than that. Since air will naturally be at the pinnicle, IF during install, movement of the case, whatever, the pump becomes the pinnicle, then that's where the air will go, which creates a very noisy pump, that does almost nothing for temps as there'll be no liquid in the pump. So, if you do install the rad in the front, be prepared to tilt the front of the case upwards at the end of any case movement, to allow the air to travel to the top of the radiator, vrs sitting in the pump. Basically you'll be priming the pump. With a top mount radiator, the only way you'll ever get air in the pump is to basically turn the pc upside down, and normally gravity will take care of priming the pump for you.
The chances of any aio leaking are slim to none at best, all I use is aios, never had a leak. Just don't stress any of the connections, jerk on hoses etc. User abuse is more likely to cause a leak than any manufacturer defect.