FusionReactor gives me 100% useful insights into individual web requests, very detailed, can't live without it. Also works great for local development, not only to monitor and troubleshoot production servers. Finding performance issues is so much easier when using FusionReactor.

Typically and especially in complex web applications (think MVC, layered architecture, etc.) sometimes those nasty db-query-in-loop are tough to find. Easy as pie with FR.

Also very helpful to see the pain-points of your website/app - those slow running requests which no one reported yet. As a developer you can proactively work on performance improvements if checking this list of long-runners on a regular basis.

Using the developer edition locally together with the CommandBox integration is a no-brainer and should be the tool-of-choice for every single CF developer. Intergrals latest addition of all the features of the Ultimate edition to the developer edition is really helpful. I will definitely start playing with the FusionReactor Live Debugger in the future more.

On production servers, the daily/weekly email reports as well as the alerts on long running requests are much appreciated. We would never find out about some of those things if we would not use FR in production. Review collected by and hosted on G2.com.

The licensing (activating/deactivating) locally sometimes is annoying in some rare specific instances, but that's about it. No real dislike at all. Review collected by and hosted on G2.com.