What do you like best?
We Use Activity To Go to monitor application updates and releases via Slack so everyone on our team is in sync. It's also very easy to setup which saves a lot of my time, as Heroku's built in App Webhooks is not really super intuitive to use. The plugin also offers streaming activity logs to S3 which is helpful for having internal audit logs. The support is awesome as well with quick turnaround time!
What do you dislike?
There's nothing much really as the add-on is pretty straightforward on what it does. I guess a small nitpick is that currently when a release is triggered, it creates two duplicate entries (one for Created release and another for Updated release). It's only a small minor problem anyway.
What problems are you solving with the product? What benefits have you realized?
Heroku application updates sent to Slack for monitoring and collaboration. Stream activity logs to S3 for audit logs and compliance. Very straightforward and easy to setup (saves a lot of my time).