I had no issues. the hardest part was not touching the boxes until everything arrived. I still ended up building it in my old case because the Casecomm took ages to arrive. As did my monitor because paypal decided to use echeque for some reason. The monitor is manufacturer refurbished and works like a charm - not a scratch. Came with warranty too. I saved £50. OCUK were really nice and price-matched most of the components I bought. They have really good customer service from my past experiences so I was really happy.
Ive never experienced multitasking abilities such as this. It cuts through everything I throw at it like a hot knife through butter. Photoshop and After Effects take two seconds to open. On my old laptop it took about 30. It almost pre-empts my clicks it feels so fast. I installed Far Cry 3 to test the performance and its phenomenal. Ultra high on everything and its super smooth. Loading times are pretty much non-existent. Runs super quiet too - with the case fan being the loudest. Amazon sent me two coolers by mistake (or I paid for two by accident, not sure which) so I might use the super silent fan from that to replace the case fan. Intakes cold air from front-bottom and exhausts hot air back-top.
The Casecomm has insane cable management considering it cost me £28+ delivery. Check out the pics. I was worried I would have issues with the cabling but the most I struggled with was stuffing it all behind the mobo and closing the back lid.
I spent a little bit over budget (it was £700 I spent a total of £892.90) but I didnt take a monitor into account back then. This will last me a good few years, and should games progress, I'll just pop another 670 in there.
Spent a few weeks researching and the best tip I can give is MAKE SURE YOU KNOW YOUR NEEDS so you dont go overspending on **** you dont actually need. Also, dont get too nit picky about parts: I got too carried away picking a monitor - reading about dead pixels, poor blacks and backlight bleed etc etc. Do a little research but dont let one bad review put you off. If you like the look of it; get it. If its broken, you are within your right to return it. This is why I went with reputable suppliers.