The most useful feature for me is that I can use my API keys to test out different endpoints without having access to production server environments (which are also expensive). Also being able to create multiple accounts with varying permissions would be very helpful if you're working in an organization where there's more than one person who needs testing capabilities of your system before going live! There isn't much else about this tool specifically as far as benefits go - but just try it yourself first because once set-up correctly, everything seems like magic afterwards :D If setting up new account or creating tests/examples from scratch takes too long then maybe look into other tools which have better templates available? We were looking at several options including Apiary2Go etc.