Easy to integrate in our app - great documentation! The UI is not as intuitive/easy-to use than other services like New Relic or Airbrake (which we used before). Also you can't set up custom tags easily enough via your dashboard compared ot others where it's easy peasy using their api console toolkit.. But overall I still think this service works very well if there are some issues they'll surely fix them soon so don´t worry about that too much :) We monitor all user experience related errors such error codes which could be sent back by an API call etc.