I replace a Nuvi 200 with this device and be quite pleased . size-wise it be equivalent to the latest touch-screen phone , so if you have be use a 4.3 ' before then this will be too small for you . transition from a 3.5 be easy and it be still slightly more narrow that the Nuvi 200 . the screen be sharper , but the button be smaller when typing . the user interface be modern and responsive and navigating be accurate since it be a Garmin . do not expect to be shop Amazon or write multiple email , but it can work in a pinch if strong wifus be available . Mine connected fine at home and the office . have not use the mp3 player , so cant comment there . audio volume be lower than the Nuvi 200 but still fine at 70-80 % . look for a small low-cost semi-versatile gp device , this work well . keep you expectation reasonable and you 'll be please . 80 $ for a new Garmin be quite a deal !