Depends on what features you have enabled, in particular, there is a bug in AiProtection in 45149 that's causing issues for some people. 45149 also has a bug that is causing wifi assoc/disassoc message to show in the log all the time. It can pollute the log badly if there is a nearby, unconnected device that is constantly talking to every router in the area. Otherwise 45149 has been fine, at least for me. A few weeks ago, I switched all four of my routers over to Merlin 384.9, and that's been fine too. I'll switch to 384.10 when it gets out of beta.