Just remarkable -- great improvements over the 901 model.First, the handset is perfectly fitted to be able to dial using only the thumb of the same hand you're hoold the device with (like Nokia phones).Second, it is so wonderfully small -- nothing else even compares.Third, they put a clip for the wire so the movement does wear out the headphone jack in the long run (I had to replace two phones b/c of this).Fourth, it has a full volume control (not just loud/soft but gradiated) -- it still could be louder, however.Fifth, the base has an very useful holder for the headset and a reasonable sleak design. It hides the cords very well.Sixth, the battery life is incredible. I think I've done about 5+ hours w/o dropping back in the cradle.You can compare this with any other cordless headset model and find they are simply generations behind. Totally worth an upgrade from the CT-901-HS. These guys are one of my favorite companies for great customer service (they replaced worn parts for free) and smart (user-driven) innovation. Great gift for people with babies who always need two hands free and enjoy talking on the phone.