Fabric - Lots of tools for mobile development
What do you like best?
Stylish UI
Very good crash reports
Free
Good dashboards with lots of information on current app status
Allows you to distribute builds to beta testers
What do you dislike?
Can be hard to search for something more granular, for example, you can't do any complex queries on analytics or crash events, or search for specific dates.
The mac app that they recommend you install to integrate with xcode can be very annoying and keep opening by itself.
Recommendations to others considering the product:
Very good if you don't need to do a lot of custom "things", if what they provide you by default is all you need then this is definitely a good option.
What problems are you solving with the product? What benefits have you realized?
Crash reporting
Analytics
Beta Build Distribution