I purchased a black Razr from Best Buy with a Cingular service plan.  Without question, it was the worst handset I've ever owned.  The unit's recepotion constantly broke up in my apartment (I get full strength on my three year old Sanyo with Sprint), and it's really hard to hear on the unit (the volume is awful).  The one bright spot for me was the speaker phone, but that wasn't enough to keep it.  I cancelled my Cingular plan and gave the phone back to Best Buy.  I really liked the style of this phone, but unless you plan to carry a second phone for your calls, I cannot recommend this unit.