Review on Modernizr by Paul Wall

I like that this can be used either in development or production environments -- very helpful for testing across browsers before publishing your site! As with any tool there are some things it isn't perfect at (elements not supported by IE 8 & 9) but overall is great when debugging cross-browser compatibility issues. Also as other users have mentioned; using css media queries requires knowledge of how they work if unfamiliar so may take longer than expected to learn them all out. There's nothing bad about modernize r itself just knowing its limitations early would help reduce frustration later down stream. Making sure websites were optimized. I like that it is easy for developers of any skill level (even beginners) to use with minimal training or explanation needed! It's very useful in making sure your site works well across all browsers without having to worry about cross-browser compatibility issues which can be time consuming when developing new sites/apps. Nothing really - this tool does exactly as expected from my experience so far. If they make updates then great but otherwise no complaints atm :).