I tried a lot of caching plugins before this, and I can say that in so many ways, Quick Cache is the best. I'm a pretty advanced WP user, but some of the other plugins were complicated and required a lot of thought and effort to get set up. And some broke my site. :-/
With Quick Cache, everything is explained along the way. So you know what to set and why you'd want to set things a certain way. Super user-friendly and easy to follow. And if you're an advanced user, there are plenty of options for you as well.
Ah, but does it work? Heck yeah it does! I use pingdom monitoring, and my site went from a pathetic load time of around 4-6 seconds to an average load time of 1.8 seconds and 1.2 seconds in the US! This plugin makes a huge difference in site speed - which is what it's all about, right?
So, two thumbs up here! Thanks!