Burp Suite is a good general tool to test websites as long as your website is not too large or you have the time for it to complete. We have some websites that only about five to ten minutes for Burp Suite to complete an attack and a spider only takes about two minutes. Other websites have taken a few hours to complete. I have seen a tester actually run Burp Suite against one of our websites and it took all day to complete.
Good for simple requests, simple scripts, assertions, and small workflows. Also not bad with the Open Source version if savvy with code as you can do a lot with custom functionality.Free version has limited compatibility with scripts/projects created from the Pro version, but functionality-wise can probably be made up with coding. As such, the free version may not be too suitable for complex scripts or for those who are not familiar with coding as functionality/usability may be limited.
The interface is a big problem: No matter how many features a software provides you, if the features are not well presented, you will miss most of them when they are actually required. The presentation of the software should be improvised and made more presentable.
Tutorial videos for beginners: This software lacks a lot in tutorials. A beginner almost wastes most of the time in finding and understanding the features and the implementation of the same. The software vendor should work on providing more in-depth videos so that people can learn and understand the concepts.
Easy to use once you learn it; however, the user interface is not very intuitive at first view. Port Swigger does provide a lot of video resources for self-paced learning which helps. Most of the end users for PortSwigger Burp Suite will be technical and should be able to learn the product with the free resources.
BurpSuite does not have an amazing customer support. All the major help that you will find is from public forums and Google. Although you will find all the required information on Google, still at time professional support helps you solve the problem in much less time and make your operations go smoothly.
Each tool is specific and are good for what they do. While Burp Suite can perform some level of the same functions, somehow security consultants prefer these tools as additional to the Burp Suite. Maybe due to open source and easy setup when compared to Burp Suite. But Burp Suite allows for one tool for many templates for each project.
Compared to SoapUI, we have been using "light" tools like RestClient extension in Firefox, or Postman. Compared to Postman, SoapUI is more simple for WSDL / SOAP webservices, as SoapUI generate all envelop, but Postman does not. For Rest API, I think that Postman is a little above SoapUI, but not too far away.