I ordered this chair and it was delivered the next day. It was pretty easy to put together and it's super comfortable. With no padding under the mesh it creates less force on my tailbone.
I found this chair to be uncomfortable after about an hour. I am 6ft tall and that may have something to do with it. I prefer a chair where the seat actually tilts down in front but these are hard to find without spending a fortune. This chair may be ok for some but didn't fit me. I ended up returning it.
The chair was easy to assemble with the provided allen wrench. Replacing an older similar chair. Definitely comfortable for a full day of working at my desk.
Love the chair! Especially the excellent lumbar support. Also love the mesh seat and back that provide great ventilation. Assembly was a snap with the absolutely fantastic assembly instructions! All screws/fasteners were color coded and in individual pouches for each step of the assembly! I've never seen a better assembly process!