Pre-built Tungsten Next Day PC

Having moved from console to PC and being in my 50's, my knowledge of a gaming PC is none existent.
I originally emailed an enquiry and received a reply from Kain, who gave me a choice of 2 machines that fitted my criteria and budget, although in the end I probably went a little over kill and purchased an even higher spec machine.
My reason for this is I play 1 specific survival game and as I have no PC knowledge I cannot ever see myself upgrading the PC and invalidating the 6 year warranty, so I see the additional monies spent as a long term investment in my gaming life.
The PC was delayed a day as the CPU's had arrived late and there wasn't enough time to test them to get the order out the same day. I cant complain that UKGC wanted to test and make sure the PC was correctly set up and working so what's a day extra for piece of mind?
The PC when it arrived was packaged very well in its box, with additional packing in an outer box.
The instructions for set up were very clear and also linked YouTube videos if required.
The PC is a lot quieter than I originally thought it would be and my gaming is seamless now and I can enjoy my time without stuttering graphics or playing on the lowest graphic setting.
My only niggle is that the case is a lot bigger than I had anticipated, not really having any knowledge of gaming PC's I had (wrongly) assumed that they would be roughly the same size as a regular PC, so may be case dimensions could be included on the spec ?