What do you use for front-end tracking? Google Analytics? MixPanel? Some awesome thing I don't know about? In the past I've just used GA, wondering if there is something better out there!
I'm also using GA and Mixpanel. Since my last project I'm using Google Tag Manager to add the scripts. I also used mouseflow before. This is quite nice for having screencasts and heatmaps and especially useful in the beginning.
We're using GA and MixPanel; besides these classics, try https://www.fullstory.com/
I generally just use GA but for a recent project where I wanted to include a custom panel for my customers I setup Matomo which use to be called Piwik so I could use the API to pull in data and it seems to work fine.
https://metrica.yandex.com/ Killer feature - session replay, similar to the one from Hotjar, but free.