Maybe it's just me, but the pictures of it inside the encasement with seams and lumps everywhere make it look incredibly uncomfortable.
Also it seems only marginally larger than a King mattress.
Edit: On further examination, I think the lumpy picture may be of the bottom of the mattress. Which makes more sense.
Edit 2: Or maybe not. From the article: "On top I would put 2" of buckling column gel, which is a squishy material similar to a bottomless rubber ice cube tray." So I guess all that lumpiness is in fact the top.
The gel is a uniform grid. It's intended to be that way. The minor lumps are the sheets which are not super tight, but as another user mentioned I cannot detect them.
Regarding the size, yeah I did realize that when I finished, but it's still visibly larger than a king in person. If I were doing it from scratch knowing that I know now I'd probably do 8x8 and then I wouldn't have had to cut the buckling column gel and it would be even more comical.
Edit: Regarding the size again, I already knew the Queen sized mattress was slightly too short for bed habits even though I am not 80" tall, and the King is the same height. The California King is the full 7' tall but 6' is slightly less than my wingspan and I wanted that to be covered.
The lumps look like small bits of extra fabric from the fabric backing on the buckling column gel. It looked pretty thin so I doubt they'd be that noticeable actually laying on the bed. It probably just looks so lumpy because of the thing encasement/fitted sheet.
Also it seems only marginally larger than a King mattress.
Edit: On further examination, I think the lumpy picture may be of the bottom of the mattress. Which makes more sense.
Edit 2: Or maybe not. From the article: "On top I would put 2" of buckling column gel, which is a squishy material similar to a bottomless rubber ice cube tray." So I guess all that lumpiness is in fact the top.