It's easy to setup, configure & use for our application with its various features such as device tokens registration/verification (including handling of expired devices), app distribution etc., very flexible in terms of customization options - we can easily modify it by adding new fields or removing existing ones if required, ability to integrate third party services like Google Analytics is also one good feature which I really appreciate! The pricing plan offered seems little expensive compared to other similar products available out there but you get what exactly that suits your budget best without any hassles at all!! Highly recommend this product especially when looking into mobile applications requiring high level security measures along with user identification process (such as preventing multiple registrations). We are using PushResponser API integration toolkit from their website where users will be able register themselves through social networks e g Facebook / Twitter accounts so they don't need an email address while registering themself hence saving us time too!!