Overall my experience has been very good. We use OpsGenie all the time, and it's a critical part of our monitoring stack.

OpsGenie is very flexible, and relatively simple to setup. You can get up and running in just a few minutes, or you can spend days customizing the setup to match your teams/policies/services. Their customer support is really helpful and will help you get set up quickly. They are constantly releasing useful features (e.g. post-mortem analysis, video conference, etc).

The onboarding process and best practices are not obvious and require some tinkering to figure out (e.g. best way to structure teams, alerts/incident templates, etc.). A guided onboarding and a best practices document would be really helpful for first timers.

stay up to date with the infra issues

--easy to configure or customise notification as per your requirement --The GUI is very simple and self explanatory

when we change the mobile frequently then all the previously used mobile pile up in the configurations which causes issue later (I was not able to get the alerts since it was sending the alerts to the old mobile )...I had to delete the old mobiles from the web console to fix the issue

OpsGenie is doing the job globally, especially on the core functionalities. Even though the website would need to be improved - and enriched via critical new features.

The core functionalities are working well, the notifications are going out. The integration with other tool is quite easy (Slack, other via API).The mobile app is also great and very intuitive.

The website is slow, and few UI glitches are very annoying if you are a Support manager and use OpsGenie on a daily basis. In my opinion the lack of real-time dashboard of the alerts is a big miss.

Our issue was reliably alerting our staff of equipment warnings and outages. OpsGenie gives us the ability to not only send notifications, but see who received them, who responded, and escalate based on a number of factors to make sure that someone, somewhere is getting the alerts.

The ability to customize how events are handled is amazing. For example, our Nagios instance sends alerts to OpsGenie, but depending on host name or group that it is in, we can have staff get a phone call in addition to app notification for critical things.

Honestly we haven't really hit anything that we didn't like. We ran into a hiccup with a bug in the Nagios integration but the OpsGenie support staff were very helpful and quick at fixing the bug.