I bought a DMR handheld two years ago and built a hotspot with a Raspberry Pi and a card from ebay. It's a nightmare to program until you understand the crazy way things are set up, and stuff always needs to be updated, including the contact list, which a lot of older radios won't even hold the whole thing. Once it was up and going, it worked pretty well, plus I could use my Yaesu radios with C4FM and the hotspot in Fusion>DMR mode. I can reach one DMR repeater from my house, there's not a lot of activity (like most repeaters).
I had thought that I could use the handheld in the car with the hotspot, using my phone for internet. It works fine, but 75% of my drive to work has no cell service anyway, so not useful.
It's on my list to get everything updated and running again, there's a few people I could talk to on DMR, even though it seems kind of pointless. Would be handy to have a few to use in simplex, slight improvement in COMSEC, at least tactically.
Overall, I'm not upset that I got the radio, it's a good handheld and has GPS and Bluetooth built in, and it will do APRS which might be useful to some.