Splunk Enterprise

Splunk comes with lot of in-built templates for each and every feature like log visualisation, dashboarding, traces,etc This makes the developers life lot easier. I can't think of any other logging tool that is snappy as well as accurate.
I love the fact how easily I can plug it in my docker-compose to push container logs.

Even though, it offers numerous features for different needs, each feature has its own learning curve. For instance log visualisation needs querying skills, which may be in natural language but it takes bit of time to get familiar.

If you need real-time grokking into your infrastructure, look no further than Splunk. I love love love the dashboards. It’s easy to tell a story with your data, and the live search is so FAST!

SPL is a little hard to get used to, but once you get the hang of it, it’s not so bad. I recommend downloading their community edition for some great examples of queries and dashboards.

Splunk is very easy to use due to high community support and many video tutorials available online for new users to learn.
Functionalities are robust and simple to use. Data retrieval and visualisation is nice and easy if you know the right querying process.
Machine Learning supports enhances performance for the cloud, especially. It collect wide variety of data and still it amaze you the way it retrievs it.

There are many tools available in market which are potential competitors of this tool and that too at reasonable pricing. Splunk offers more functionalities but costs you too much if you look at the work it does.
Complex queries may require large CPU usage and may even freeze or atleast slow down the system for a while. Need to be specific while querying the data.