I tend to use mine for the same uses I have my Samsung tablet for:
Maps and Navigation (there are several good apps, but 72ka's Google Maps port is great)
Browsing (the browser is old but loads most of my sites well enough)
Mail (MS Exchange for work, and Yahoo (with new certificates) and GMail still work)
Reading (the Kindle app still works fine)
Work (The Periodic Table app is fantastic, and Old School Calculator is great too)
The occasional editing job (SmartOffice and QuickOffice)
File access for work (WebDAV Client for Box access, and there are apps for Dropbox and OneDrive too)
Entertainment (Kalemsoft Media Player, Music (Remix), Pandora, Spotify (takes a few minutes to get it to work, but it does))
Shopping (Groupon still works, Where to Go? and Where to Eat? and Google Maps for shops and food)
Flight tracking (FlightView, but it runs in Classic (how do you fix this? Someone was doing that a while ago but didn't get to FlightView before stopping))
There are a lot of apps I've downloaded and never really used, so I still have some exploring to do.
The Go fits in the cargo pockets on my pants, so I can carry it when I don't want to lug around the bigger TP 4G or the Samsung Note Pro I bought for work. Still a great device for me.