Created a topic, Not useful, on the site WordPress.org Forums:
Poor interface. Usability needs improvements.

Created a topic, Too many bugs, on the site WordPress.org Forums:
Didn't work for us. It keeps showing the captcha.

Created a topic, Best performance plugin, on the site WordPress.org Forums:
The best performance plugin!

Created a topic, Poor performance, on the site WordPress.org Forums:
Bad UI and poor performance.