This is probably the best PDA phones I ever had. It has been almost 3 years since I am using this phone ruggedly. And some of its features such as WiFi with dedicated SSID and MAC id are great for a computer freak like me. I wish SONY still produces this phone - because I checked the new Xperia out.but did not like the ease in usage. With tons of application and features this probably makes the phone as one of the best produced by Sony Ericsson team. Business card scanner works great to easily transfer the information from camera to the contacts. Sound quality is of iPod quality - specially with their Mega Bass function; in fact though it is a business phone but Sony did not leave any stones unturned in making this a great walkman too. Other features such a 2 mega pixel camera(even though now a obsolete feature) is clear and sharp. Symbion OS has never caused any problem to work with(with only few hang-ups on and off).