We have a great success rate with repairing water damage devices, overall around 70% success with the iPhone 4 iPhone 5 iPhone 6 being some of the most successful devices to repair with liquid damage,  Obviously every case is different. We find once repaired from liquid damage successfully, we usually do not see the device in our store again for the same fault  If we can not repair the device there is no charges unless it has been posted you would have to pay postage cost back.