The GPO Stylo is a nifty little record player, and for £40 is the cheapest record player I could find. I've certainly heard worse from built-in speakers (although they still sound a little bit tinny), and if you have no intention of connecting your own speakers then this is a worthy purchase. However; if you listen to rock/metal or music that requires decent bass, this may not be up to the task.
When I tried to use the 3.5mm out jack one of the built-in speakers wouldn't switch off, meaning that the sound output was split between the built-in speaker and my sound system (and my headphones when I tested them). This caused a variety of audio issues which meant that using the audio-out jack was not really an option. With great sadness, I had to return this record player as I needed a turntable that I could hook up to my sound system.