I think this headset would be suitable for occasional use or as a spare, but personally didnt have a great experience of them.
The headpiece is very generous size, so I found that they didnt sit comfortably on my head and even adjusted to the smallest setting the earpieces were still too low. Obviously this may be an advantage for bigger heads! The lead/wire is a good length so you dont feel to tied to the computer!
Sound quality - so so. I used them on Skype daily, and generally I could hear fairly well, odd crackle and hiss but this was to be expected with a cheap headset. The microphone however isn't the best, with the other party often struggling to hear me or complaining that it sounded like I was under water.
I managed to get 2 weeks use out of them before they fell apart at the little junction box where you can adjust the volume.
Would I buy these again? - No. If its cheap and cheerful you want, there are cheaper models available that are of equal quality imo.