Well, I also have occasional freezes (also probably once a month, typically it's when resuming from sleep) on my MBP but no more so than I had in Sierra and all the releases before. My iMac (5k) has been pretty much 100% reliable though, so I attribute most of this to the MBP hardware.

I'm not saying 10.13 has been perfectly reliable, but it doesn't seem less reliable than previous versions to me.