I like that it is very customizable, so if there's something in particular i want changed or added then its simple enough for me to do myself! Its also free which makes this software perfect as well!! Nothing at all really except maybe how time consuming some things can be when creating your own voices/textures etc. But once everything has been created by someone else (which takes about 2 hours) it comes together perfectly without any problems. The only thing with smorphening is making sure what you are doing will work properly on multiple platforms such as android phones, windows computers ect.. otherwise it wouldnt make much sense using an app called "speech morphing".