Mixpanel

Pros

Mixpanel will be ideal for you if you need a simple, yet powerful tool for your SaaS product. One of their features that I've found most useful (and I haven't really seen it in the competitors' apps) is Signal. Once you apply it to your events, it shows you which ones you should encourage your users to do, and predict behavioral trends within your product. A must-have for a modern product marketer!

Cons

I wish it would be easier to implement your own data to the user profiles and events there. You also can't collaborate within teams.

Pros

Once you set it up properly, you can use Mixpanel to track every granular user action. You can save numerous details with each event that's important for you to know such as device, browser, country, campaign UTM, etc. Mixpanel provides you with several types of reports you can analyze data with such as Insights (break down user actions to show how many share X, Y or Z detail such as campaign UTM) and Funnels (conversions between user actions). You can also use Mixpanel to send notifications (email, push, in-app) to users based on their actions. It's a very powerful analytic and marketing tool.

Cons

Lately, Mixpanel has made quite a few UI changes. Some have been helpful, others less so. Example with a recent funnels UI change: if you add a breakdown (which breaks down each of the funnel steps by a specific detail like country), Mixpanel adds several different colored bars to the funnel, which makes it very difficult to visually see the conversions between each step. I'm not sure if they do any testing with users before launching new features or UI but their user experience would benefit a lot from it.

Mixpanel also does get expensive as you track more user actions (events), but it's only powerful and useful when you track every user action, big and small. Otherwise, your analysis would be based on an incomplete picture and cause incorrect findings.

Pros

The new UI is really nice (visually), I love how graphs look like
Mobile app is super snappy
Integration is easy
Automatic insights are actually useful

Cons

Building useful graphs can be challenging and sometimes counter-intuitive. Of course, I could watch all their education videos, but I simply don't have enough time. I think there's a lot that can be done in the "getting started quickly" category.
Also, I somehow can not pin a flow-diagram to the dashboard or even save it

Pros

The best part about this app is that I able to track a mobile and web user of my application under the same umbrella.

Cons

The user interface is not the best for non-analytics or non-technical users but it is better over time with the new updates.

Pros

Sign-up was too easy and the free tier is very generous.
Installation was time consuming but this is mainly related to our codebase.
Segment integration is working like a charm.
The best app for setting up analytics for SaaS apps.

Cons

Emailing user experience should be reimagined and made much more intuitive to match the amazing user experience of the whole app.