I ordered and returned a Phantom 3D-Grid model, specifically the red one. The ratchet at the back can be moved up and down, which is nice, but was stuck too far in when I received it and I had pry it out with a knife following the instructions from the seller on Taobao. Ended up getting it out and it was extremely loose. Put it down on the table with the shell up and the ratchet slid all the way back into the stuck position. Luckily, I still had time to return it.
Assuming that's just a one-off QC issue, the helmet looked super cool and the 3D printed liner is pretty interesting. It's kinda weird, though, in that your scalp only actually touches the middle liner, not the ones on the side, but upon pressing down the helmet (like an impact would), it squishes nicely and then the second set of liners can engage.
I also ordered the Alien model in size L, but it didn't fit me at all. Assuming I measured correctly, my head is about 58 cm, so it should fit, but it was too big. Maybe a rounder head than mine could've fit better, though. For reference, I have an Ekoi Aero16 in size M that fits fine and a WWW AR0 in M that also fits nicely.
