What do you like best?
I like SkyCiv's simplicity the best. It's easy for anyone with the basics of matrix stiffness method or modal analysis methods to simply step in, create the structures they want to analyze statically, and run the analysis. It's much easier to use than RISA.
Additionally, their feedback and customer service is some of the best I've seen. Their response time is so fast t's almost like they're on call to answer questions. You talk with a person about your specific problem. They don't feed you a copy-paste FAQ answer that's "close" to your question, they address it directly and you get solutions.
What do you dislike?
The only issues I've had aren't issues with SkyCiv, but rather, issues with browsers running SkyCiv. Because it's browser-based, there can be some headaches if you (or your office) have old versions of browsers that aren't as compatible with SkyCiv as others.
Recommendations to others considering the product
The free options display the ease of use very well. What you get with the determinant beam analyzer is exactly what you'd get with the other features - just in more dimensions.
What business problems are you solving with the product? What benefits have you realized?
I typically use SkyCiv to check my indeterminate beam calculations for classes. I am a structural engineering graduate student, so I often have to check my work with SkyCiv. Additionally, use of SkyCiv during my term project in Advanced Structural Analysis (5 story, 3 bay x 3 bay building) was indispensable.
I would love if we had this software at work, but that's not my decision to make.