Sorry I didn't get back to your post sooner
The XSPC block install was simple, and instructions were simple and direct. The only problem I had was that I forgot (out of ignorance) to install the last screws on the board, so my VRam3 temps are always 10c higher than the rest of my card. I thought that I had put in all the screws and there were just spares
My-B. I've got them now, but still haven't put them in yet. The block still keeps the temps nice and cool.
Installation is simple, follow the instructions. The only part that might be difficult/emotionally straining is once all the screws are off, you've got to kind of just pull apart the cooler from the PCB. That's the tough part because there is always suction/adherence from the Thermal Interface Material ( or thermal paste / TIM) between the GPU itself and the cooler.
Also, putting the thermal tape on the VRAM/VREG/Shaders is a bit tedious, but really simple to do. If you want to be a nut about it like some people are, you can upgrade to higher-end tape, or you can even cut the tape to perfect proportions of the chips and mount them. They're a pain because they're double-sided sticky, so you've got to install it exactly how the directions lay out. I didn't, because I thought I knew better, but I was wrong
it was more difficult, but still possible to install, just more of a pain.
It'll probably be some trial-and-error before the install is complete, but just chill, take a deep breath, sometimes walk away if you get frustrated and come back again cooler-headed. Just remember that if you get pissed and just want to throw it together, you'll end up taking it apart again down the road and doing it right, so might as well spend the time the first time and do it right.
Also, one other problem I had due to inexperience was a leak the second time I installed a card, where the barb screws into the block. I didn't cinch down the barb enough (never actually cinch, ease it in, watch the o-rings on the barbs, put pressure on them but don't squeeze them to death) and formed a leak. It was easy to spot during filling, and easy to fix, but it was there.
So far I'm in about 2 months on the first block and a month on the second block, and can't complain.