I like that it is very easy to use as well as having all of my tests in one place makes things so much easier! It's not too expensive either which was great when we were just starting out with our project.
There are some features that could be improved but overall this software has been really helpful throughout development process - especially if you're doing UI testing or anything where automation can help save time/effort. We have used qatts primarily during application design phase before writing any code. This way we don't waste valuable developer resources while also ensuring everything will work properly once written (and tested).