I like how easy it was to setup, configure everything we needed in order set up tests with our ads campaigns! It's very intuitive interface makes this process really smooth when you have some experience using google advertising platform but if not - there are plenty tutorials online which can help out beginners as well! There were no problems encountered while setting things all together, nothing negative either just keep your mind open because sometimes even simple tasks may require little bit more time than expected or need additional configurations etc. Once test started working properly (we used real-time bidding) results became much better compared previous ones where CPCs increased significantly during first days after launch so i would recommend giving them try they surely will work great :) We managed to increase click through rate by over 50% from what average CTR usually has been before adding these features into campaign settings.