The most helpful thing about K6 is its ability to create realistic test scenarios in order to simulate real world traffic loads as well as different types of error conditions which are quite useful when it comes to performance tuning our APIs. I don't like how you can only use one type of API at once with this product if your goal was just simulation purposes but not actual stress tests (if needed). It's good because we were able to see what would happen under certain circumstances without actually implementing those into production code yet! So far everything has been working perfectly fine except some minor issues here or there such as slow response times sometimes. This helped us figure out any problems before going live since these simulations allowed us to do things like try new features/changes etc. while still being offline. Our main focus now is always improving upon speed by using tools similar to k6 instead of waiting until something goes wrong then trying to fix it after launch.