My favourite design, assuming you have the ability to create the middle sling swivel needed.
Its easier & faster to set up than a target type sling, more adjustable for summer lightweight & winter bulky clothing changes to the setup & much handier in the field both when shooting & when carrying.
For formal target competition I'd go with a real "target sling", but for general purpose use its just right for me.
Allan Quatermain: “Automatic rifles. Who in God's name has automatic rifles”?
Elderly Hunter: “That's dashed unsporting. Probably Belgium.”