It has been 4 and a half months since I received my PC.
I am someone who is reasonably technical, and so was invested in every final detail of the build.
I spent quite a long time with their team determining the build that would be best for me. And it is quite clear from my interaction with them that they genuinely tried to give the best service they could. They answered questions, informed me of my options and kindly gave recommendations clearly based on their own experience building PCs.
And their pricing was very reasonable. Likely comparable (if not better than) buying the individual components online and assembling yourself.
Additionally, you get the assurance of their expertise for the actual build quality, and the safety of their own― at the least reasonably extensive― testing procedures (for which the software they used I found remnants of on their Windows installation).
The build arrived, directly shipped, safely and in good condition. And in the time since then, there have been amazingly minimal technical issues with the hardware.
I have installed my own operating system (Linux, the distro being NixOS), changed the bootloader, (and even boot partition), performed large downloads over the network, pushed the GPU to near maximum usage for extended periods of time in video game titles and did my own software development. All without issue.
There are still some ways in which I have not pushed the system, such as overclocking. I also notice some dust entering through the case and dust filters, which I will need to clean out occasionally. The fans can also be a bit loud, but it's nothing very problematic. Regardless I am immensely impressed with my experience.
I should also mention that we had some administrative issues with honouring large, old gift vouchers after operations were silently transferred to a new company that didn't recognise this legacy system. But the people there were good to us, and eventually we managed to recoup (almost) everything from these vouchers. And this issue is already water under the bridge; it shouldn't affect any future customers.
If you're considering whether to build & purchase a PC with CustomPC/GameForce, I can only recommend them. Especially if you're local to Ireland.
My gratitude to the team at GameForce.
Thank you, Jason and David!