Easy to install and Very very very good support and prompt response from this developer.
Keep it up bro
I have no idea about many website optimization tools such as CSS Spirit, URI, GZIP, CSS merging and how to implement this tools to my joomla website. But this extension much help me to optimize my joomla website simply click this and that, trial and error and woooo my website gain speed significantly from 14.54 s loading time to 3.79 s for 100KB/s (almost 4 times).
Perhaps the most important things that I found in this extension is when I makes error when I try optimization combination that makes my website messy, Simply click disable for this extension and try new combination always solve my problem (This extension makes trial and error completely reversible without force your website into new fresh joomla installation)
The only you need extension when it comes with website speed optimization