It feels good not to have the ear with the portable heaters or be forced to put headphones who get involved all the time. most: design, weight, listening comfort, the possibility of finding the old reflexes combined wedged between head and shoulder, the phone rings anyway even if the handset is connected top and interior button lets get directly least: over the handset can not withdraw from the handset. so if one day to use there is an electrical wire that discards or that poor contact between the wire and the handset, one is forced to buy a complete handset without changing the power cable only. we'll see if it wishes to use.