Needed this as now working from home, its really comfortable. Was easy to put together. Only think i will say is that the Arms could have been made out of metal rather than Molded plastic made to look metal. 
Features
Excellent lumbar support - really great Support
Perfect for office spaces - Yes agree

Swivel: Yes
Lumbar Support: Yes - Confirmed
Tilt Mechanism: Yes - Confirmed
Adjustable Tilt Tension: No -Its states no yet there is a knob underneath that allows you to adjust the tension so this is incorrect
Seat Height Adjustment: Yes - Really good if your 6ft 6 like i am
Armrest Type: Fixed; Padded - A must have and very comfortable