Waze feels more like the R&D app for maps. It doesn't shave seconds or minutes off my time, but what it does do is constant A/B testing to see if another route could be faster. I know the area fairly well and I routinely ignore the route Waze wants to send me unless there is a clearly identified problem on the normal route, and when it re-routes to the path I chose, it's a minute or two shorter. Why did it try to send me down the slower route in the first place? Waze pulls this crap routinely.