The best thing about webload, for me personally was how easy it made debugging issues when developing websites or applications we were working on as well as being able to test our products without using any sort hardware! It does have some limitations such as not supporting all browsers out there but this can be solved by adding plugins which are free.
There really isn't anything I dislike apart from maybe having too many features because sometimes you don’t know what they do so end up doing nothing if nothing comes along naturally after trying them (which happens quite often). Try different types of tests like stress/performance etc before deciding exactly where your bottleneck lies within a website / application once again try other sites to make sure yours doesn’t suffer anywhere else either - just go through each step carefully until everything works properly then move onto another area.