BIG TROUBLE!
16 days after I installed the ROM, it completely sh*t the bed and got stuck on the HTC screen after a reset. I had to pull the battery, with no luck. Tried multiple times. Luckily, it booted into the bootloader. Flashing another ROM now.
If it helps, it happened one day after installing SmartLock, but I noticed that the SmartLock icon was not showing up in the SPB Settings > System menu, leading me to believe that the issue was with SPB Mobile Shell.
I consider it a waste of time to get the SPB Mobile Shell key because I removed it 2 days after activating it.