In Poland Ninkear laptops can be usually bought second hand 30% lower price than the competition - its incredible value for money. I had 2 of them in the past both bought in used mint condition, A15 Plus (5825U) and S14 (7535HS). A15 was very bad: heavy, squeaky case, low tier speakers. Also had issue with pluging lower than 65W raded usb-c charger. Laptop would stuck permanently on ultra low performance mode. This could only be fixed by reseting the BIOS to factory settings. The manufacturer released the BIOS fix but only way to update it in this device is to prepare a usb boot pendrive with UEFI boot loader, boot it during a system startup and type (!!) multiple commands pointing to the BIOS update files - truly marvelous experience but this fixed the issue for me.
On the other hand S14 was one of the best laptop i ever have. Ultra light, excellent stiffness, great speakers and keyboard, beautiful 2k screen and 0 issues on all fronts. Additionally S14 came with beautiful magnetic box and compact GaN usb-c charger - i could pay double for it and still it would be good value for money. So anyone whose considering buying Ninkears laptops need to do thorough research - its a gamble with them but again theyre cheap.