looks interesting - but the only machine I have with marlin is the ctc i3 - and it's hands down the worst firmware on all 5 machines. You can't even load filament with it. Have to do everything through the simplify3d control panel.
Not sure what firmware is on the mini, it's pretty basic, but works well. Also apparently the version of marlin someone's made for the mini delta doesn't yet work with the mini's wifi.
Which I will occasionally use for small, quick prints.
sailfish and repetier are my favourite firmwares. Just give you a lot more choice of things to do directly from the control panel.