I was wondering about the Meinier "Snake" 29" hardtail frames also. Just started noticing these since about 1 year ago maybe, but haven't been able to find any reviews on them yet.
I really wish some folks start uploading youtube videos about them, since their product listing looked pretty legit on aliexpress.
So, aside from having to source 7mm tall headset bearings specifically, folks didn't have any issues installing parts? No notable quirks of having to internally route up to 3 cables (rear derailleur, rear brakes, dropper) through the headset? Was there any need to deburr threads, face spray off the bottom bracket shells, or sand anything down? Is there any vent holes of sorts around the bottom to let some water drain when the bike is washed?