Nope, even with other models like the H50 and H80i i haven't had any leaks. Just make sure the h60 your getting is not refurbished.
Excellent, is it easy to install and does it come with thermal paste?
Yep and Yep. It's thin and smaller than lots of other liquid coolers so it shouldn't be a big problem putting it in your rig. Thermal paste is good too, i've had no issues with using the built in paste.