It's easy to use for both novice as well as expert users. All fields are intuitively displayed with clear instructions given in simple language. I haven't found anything that I dislike about this device. Easy to install and configure. The support team at ACU has been very helpful when we have issues with our system. Highly recommend this product. We have used it in several of our buildings now and no complaints from any user or administrator perspective. Monitoring multiple power sources across many floors/buildings.