I love that it's easy, quick & free! It shows you exactly what your website looks like in an actual browser so there is no guessing or confusion about how things look at different resolutions/screens sizes etc. We have been able find some errors we hadn't seen before but were only because of this tool (which could be just me being lucky!) The layout can sometimes appear cluttered when multiple elements are open - not sure why? You'd think with more customisation options they would make layouts less 'busy' than other tools out there however if anything else maybe adding another row above each section would help reduce clutter too :) Definitely worth using as part of our monitoring process though!!
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