Sennheiser headsets span a wide range, covering sports, entertainment and business use cases. There's a significant market for headsets that can double up for work and leisure, and to make the grade they need to cater for business requirements like voice calls as well as leisure needs, such as high-quality music listening. If the Sennheiser MB 360 UC can do well at both, then the £219 (inc. VAT) price tag might be attractive.
Sennheiser MB 360 UC review at ZDNet