By booking your appointment you ensure that your repair parts will be pulled from the shelves. This prevents and delays because of out-of-stock parts and keeps the turn around time as low as possible.
Why read reviews?
Reviews are important to read simply because of the objectiveness. Anyone can speak up about themselves and their capabilities. When others say the same thing and you start to see repetition in the reviews then odds are it is true. Make sure your leaving your phones in the hands of an expert.