It's pretty comfortable.  I like that it doesn't have fixed reclining stops; you can tilt it to whatever angle you want just by leaning forwards or backwards.  It does a good job of staying at the angle you put it as well, even without using the screw.  Unfortunately, the swivel part isn't great.  It doesn't use ball bearings or anything, it's just two pieces of metal rubbing against each other.

Update:  I've used this chair in a WFH office for about a year now and the durability isn't great.  After a month or two, I'd worn a dent into the arm padding where my elbow rests.  After about a year, the welds in the base are breaking and the steel is bending.  The result is that the chair can rock side-to-side and will probably need to have the base replaced soon.