Secretlab omega 2018 owner here. I've had the chair since Febuary and I'm very pleased with it so far compared to the DXracer D series I had before and some ergonomic office chair before that (not sure what it was called)
For reference I'm 5'8 tall and weigh 67kg with a slim build. The chair is very comfortable for long sessions at my desk (4+ hours of sitting at a time), the head pillow and lumbar pillow are soft with a velvet finish, the armrests are large with a soft smooth rubberised finish and its ine of the things I really like about it, my dxracer had firm armrests thst were uncomfortable after an hour. It has a great range of adjustment compared to a lot of chairs I've used which is important for being comfortable imo, nothing worse than armrests not being level with your desk or the chair being too short etc. And its very aesthetically pleasing compared to other "gaming" type office chairs.
With chairs I'd recommend trying before you buy, if there is a showroom/LAN centre near you or a friend that has one because everyones body is different, but the omega is exceptionally good for a "gaming" office chair and I'd say go for it.
If I didnt cover anything that you want to know then just ask^