I like that it's free to use with so many options available in terms of the amount you can see about your site or domain as well as how often updates are made without having to pay monthly fees which some other services charge a lot! It would be great if they had an option where we could set up alerts when certain things change but this isn't something i've ever noticed them doing either way not sure why there wouldn't have been one by default? Would recommend giving it ago because its very informative especially regarding user friendly design issues. We realized our mobile friendliness was lacking compared to competitors who offer similar products at higher prices/fees (like Wix).