nice review from gsmarena
Sony Ericsson K660 preview: First look - GSMArena.com


Neat and friendly, Sony Ericsson K660 is fit to have a go at the mass market. It brings no novelties but manages a balanced set of features, some of which we've already seen in upmarket Sony Ericsson products. The midrange K660 gets its edge from HSDPA and elsewhere stays faithful to its price range. With an expected price tag of about 180 Euro, that should be enough to hope for solid sales.