foxitrot wrote:Except that on some roads I'm occasionally driving much slower than their average speed. In such cases the ETA is totally unusable and I'd appreciate an option in the client for specifying my personal preferred max speed.
Waze's speed data is correlated to time of day*, so it takes time-of-day variations into account. If you're driving slower because overall traffic is slower, Waze's ETA should be accurate. If you're driving slower than prevailing traffic for some other reason, I don't see how any other nav is going to give you a better estimate.
* I'm not sure if it also takes into account weekday vs. weekend, season, holidays etc.