You could do a lot worse for more money.
I have had several "gaming" headsets and I still use the original PC350 headset at work, now some 6 years old (ear pads swapped once for the same ones used on the g4me zero). Got my wife these PC350se editions too. I also use the g4me zero at home.
I would recommend the g4me zero but these are just as good minus the bling and comfy ear pads. The ear pads on the PC350 SE's are a bit stiff and it is the only significant difference. The good news is later you could just get the memory ear foam pads used on the more expensive g4me zero and put it on to these. They are some £30 delivered though, but should see you through another 5 years. I much prefer the non sleeved normal rubber cable on the PC 350se's though, as they seem to pick up noise from the cable touching things much less.
The sennheiser headsets have excellent sound quality but they are not bass heavy. That is not to say they don't have bass, because they do, it is just not over emphasized.
Comfort is amazing and I could wear them for many hours.
They are closed back.
The mic is as good as it gets in this price range.