Anyone here use this? --> Koolance EHX-1050BK

It wasn't bad per say, but it's a bit noisy and I decided to just switch to a custom system. It's pretty easy to install provided you can get the tubing out of the case without problems, however what I don't like is that unless I use koolance for everything I void the warranty. There's a lot better stuff out there, quieter more powerful pumps, better tubing, etc.

I only started watercooling recently though, still I do know that the pump on that thing is a bit noisy.

Then I would recommend getting a kit from Danger Den instead. It's pretty easy to install and get working and may actually be cheaper in the end.
I recommend a Laing D5 pump, Tygon 3603 tubing, (your choice of reservoir or T-line) and a Black Ice Radiator, it's pretty cheap and should fit into your system pretty easily if you are only running one loop.

If a person new to water-cooling like myself can do it I'm sure you can do it (and it works really well, quiet and powerful pump once air is purged)