Sennheiser Multi-Platform Gaming Headset

Can anyone talk about quality of mic?

I am looking for a headset to make hands free voip phone calls in a fairly noisy environment (work shop that is noisier than a normal office.) I also want to use it for voice recognition when it’s not too noisy.

Will these work for that? PC has a good sound card. Can I plug into 2.5mm jacks instead of using built-in A2D/USB?