just noticed that theres a F15 thread here so i figured ill chime in on the whole ordering and building experience since i built mine almost 7 months ago.
ordering:
first of all, the seller speaks english and seems to be honest and genuine (emphasis on the word seems). when i placed my order for the case, i paid RMB 1599 for the case in silver with solid panels and another set of semi transparent acrylic panels. up to this point, he was being honest and transparent, that is, until i have made the full payment on TaoBao. i have explicitly told the seller to send me pictures of the case showing any manufacturing defects or dents before it is being shipped to me so that i know if there are any marring on the outer surface that is beyond acceptable. he told me via wechat that there were no defects or dents, apart from two marks that are too fine to be seen even close up. however upon delivery, that was not true as there were numerous scratches and dents on the front, rear, top, bottom and side panel as well as anodizing imperfections on the top panel, resulting in a slight colour difference. there were also holes that were drilled wrongly and there were an attempt to cover the holes with the power supply bracket, however, half of the hole is still visible.
build:
i have a 9900k and a rog 2080ti strix in the system with a nh-u9s and sf600, 6tb WD 3.5in drive. cable management is fine as long as you spend a lot of time zip tying everything. the 2.5in hdd mounts behind the front panel are useless if you choose to use a 3.5in hdd mounted on the psu bracket. thermals is not great and it is bloody loud since you really have to push air into the case. 9900k undervolted to 4.3ghz all cores during gaming hits around 75c with the 2080ti strix at around 70c. note that i have 2 noctua ppc fans as intake from the bottom at around 1900rpm during gaming.
what i would say is that unless you're comfortable spending this amount of money on a product with scratches and dents, then you do you. but the thermals and noise is not worth it. youre only buying aluminium panels and not a perfect one too.
iirc scythe mugen 5 rev b is the biggest cpu cooler you can fit.
tldr: ncase m1 is better. this was a disappointing and worthlessly expensive case for me.