I only used them once and had to RMA it because it failed memtest when I ran overnight testing. At some point I might try them again, if nothing else if someone else buys parts for me to build their PC. I recommend stuff for people to buy but in the end I tell them to get what they can afford.......obviously because I want to make sure there is enough money left over for them to pay me.
Regarding liquid cooling if you have a large enough case with good airflow and quiet fans I haven't found it necessary unless you are using two GPUs or are really overclocking the hell out of it. Currently I have an older i7 from a couple years back that I have OCd from 3.2 to 3.6 and I can go higher if I want but I haven't seen any need to. To be honest I didn't even really need to go past 3.2 for my purposes which is school homework and video games. The thing with liquid cooling is that if your have an OCd system and your pump goes...........you are [censored] in the ass unless you catch it right away. If one or even two of my fans go out its no biggy as I have some leeway.