It hangs and causes serious problems , I had it for about a year, had to restart my nodes quite often, every three weeks approx... Once I remove it never a problem again. A router with AdGuard built in is the ideal condiguration.

But give it a try, your HW setup may be able to manage it without intermitent issues

How is it going with your PiHole experience?

I read you asked about Umbrel best config, I play with it for a while and have two of them installed in different locations running smooth with almost no maintenance required. But only after I removed all apps and left exclusively the Bitcoin Node Core, Electrum Server, Dojo Server and Tailscale.