One you follow the fourteen step instructions, it's as reliable as any non-Android Linux Bluetooth stack. I've been using Arch at home for half a decade now, and it's been absolutely boring in a good way.
I had a glitch plaguing me for a week on my work laptop. The left mouse click would get stuck. It turns out a Bluetooth mouse was powered on in my backpack! At least Ubuntu was reliably connecting with it...
About 7 years ago I built an Intel Baytrail based server with no moving parts other than two hotswap HDD bays. I keep it in my garage and synchronize other computers' storage to it. Same deal, I put Arch on it and I just SSH in every few months and update it.
The rolling release is great exactly because there's never a disruptive distribution update. Of course there's the occasional update glitch that requires manual intervention, but the community is very quick to document the solution.
I just wish pacman was smart enough to update the keyring package before trying to validate signatures on other packages.
I had a glitch plaguing me for a week on my work laptop. The left mouse click would get stuck. It turns out a Bluetooth mouse was powered on in my backpack! At least Ubuntu was reliably connecting with it...