The digitizer comes with tool for opening the Lumia-housing and is prima packed in a plastic shell. The digitizer is already provided with adhesive, so that you can easily stick to the cleaned frame the glass. From the functionality I feel no difference to the original Touch. But a star I had to pull off, because the connector to the motherboard one track is too small, so it does not secure locks and can be solved relatively easily. But this disturbs not really, because the assembled housing then ensures that the plug does not come loose. I would recommend this product definitely has something for everyone of an L520 with a broken wheel. This Digitizer can restore the full functionality of Windows Phones