LaunchDarkly has been a great product & the team has been great to work with
What do you like best?
I'm not aware of any other product available that competes with Launch Darkly. Setup and integration has been fairly easy and the product is flexible enough to make it work for my organization without trying to conform to rigid patterns. Well documented SDKs are available for a variety of languages/platforms. The SDKs are consistent without being "cookie-cutter". They take advantage of the strengths & tendencies of the language & platform they were written for.
What do you dislike?
Licensing and access has been a bit of a challenge. We've had to limit the amount of team-members that are able to use the system and come up with work-arounds to expose the information about flags and segments to the broader team.
What problems are you solving with the product? What benefits have you realized?
LaunchDarkly allows us to distinguish between "deployments" and "releases". Since on-boarding the platform we done production testing of new features, feature roll-outs & kill-switches all without the time, effort, and risk of deploying the application. We have an upcoming feature that we plan to rollout over multiple platforms. In the past, we re-purposed marketing software to achieve this and it was fraught with challenges along the way.