I've been running Bminer v15.0 for a few days now. Some users were reporting stability issues, and I had some early with my prior overclocks, but running with stock core/memory and slight undervolt on SMOS, I've only had two restarts in a little over 3 days between two rigs. One rig has 2x 1080Ti (0/0/225W) + 2x 1080 (0/0/155W) and gets a combined 4.19gps poolside (miner reports 4.38gps) on C31 using Luxor, with less than 0.2% rejects. I haven't tested it on any other pools. If you're just looking at 1080Tis, mine report ~1.26 poolside (1.32gps on the miner). I've also got a 2080Ti running at 1.84gps poolside (miner reports 1.91gps) on C31. The new NBMiner looks interesting and I'd like to test it, but I have testing fatigue, so it'll probably be a few days before I get around to it.