I needed a research analysis software and I couldn't find what really fit my requirements but SimpleX addresses more than what I need and it is amazingly super fast to load the analysis result of 1000s of data rows... literally in seconds.
The wizard in the beginning is super super useful and eliminates the learning curve complications, very well thought of indeed and a "should be followed" method (I wish other SaaS founder take it as an example)

So here is what you get if you're still thinking about it:
- You create a survey analysis
- Chose between "Step by Step" --> this is what I use, or Fast
- The wizard will take you through the following steps:
* Select your data file (Excel, CSV)
* The file will be identified in second, then you should select the worksheet
* Select which column contains your review text
* Follow the next steps to choose your filters (Ratings, likes.. etc.)
* Finish and get your data dashboard in no time!!!

The analysis will be presented with so many controls to the left and right of the dashboard, but since you start with the wizard, things will become so easy to keep tweaking and tuning the filters and I bet, the first thing you'll start with is the keywords, since it's getting extracted from all the reviews, but in my case, I tested the platform with a restaurant review research, a list of restaurants and reviews, and it was easy to select any of them from the "Name" and then chose the keywords.

What I really wanted to see:
- More visualization and chart customization in the Keyword associations
- Number of result in the Keyword's filter and ability to sort them.

And, Thanks Stephane for addressing the limit concerns & I wish you all the best