I've been a long-time user of MenuMeters, so that is my frame of reference coming into this program. MenuMeters is a stalwart favorite & just works - for free! But if you're ready for more information and flexibility, this packs a lot of information into the same compact space. I've got it set up to look just like MenuMeters, but each menu provides a much greater wealth of information.
I would like to be able to customize more colors than just the default highlight color and various charts -- mostly interested in changing the colors of the real-time graphs on the menus themselves. Also, the world clock isn't flexible enough for my needs so i'm sticking with Meridian (custom labels, ordering, offsets + alarms). Also, the fan control doesn't seem to work on my 2011 iMac.