OpsGenie has great functionalities with an awesome user-friendly interface that anyone can understand.
I like the user-friendly interface and how easy it is to integrate with other applications. The search functionality in the Alerts section is super flexible and easy to use.
The economics of the platform fit our needs better than the alternatives. I like the ability to easily spread the responsibility of support across the team.
Any (minor) troubles I've had turned out to be something I was doing wrong.
It's hard to setup rotations and override on calls in some cases. If I removed one person from the team rotation, all the past rotations that were done also got moved and messed up the whole schedule.
The mobile application refresh is awkward and non-intuitive.