One thing that iStatMenus is better for me now than this is that it shows me the top 5 processes that use memory or CPU. However, I like the fact that putting all the information about the current status of my computer from my taskbar to the notification center, declutters my taskbar. Congrats for the execution, it looks beautiful.
On my system the widget crashes with "[__NSCFString firstObject]: unrecognized selector sent to instance"
OS X 10.11.3
MacBook Pro (13-inch, Early 2011)
I'm sorry to hear that. This is the first problem we've heard of. If you don't mind, please create an issue on BitBucket at https://bitbucket.org/tildeslash/monit/issues/new with more information about your system and the crashlog.