Share my 2cents...

waze is accurate if not peak hour in terms of eta. It does not calculate the whole journey properly. Most of time it will increase the ETA continuously due to jam along the way. Example peak hour from klcc to damansara, it will usually estimate 40mins but when reach destination, end up 60mins to 90mins. Perhaps the journey is still fastest but who knows right? Maybe in beginning of journey, it is wrong as it doesn't calculate the whole jam along way or maybe its correct but jam start midway.

What I love of waze is its quick logic to recalculate and the choice to give alternate routes so I can change route or compare on the fly based on km or ETA. So far maps are accurate except for road blocks which can't avoid.

It helped me avoid the recent mahameru landslide ... yay!

Some bugs are when you miss a turn or want to take new way, it will recalculate and tell you to u-turn back to original route... so I end the navigation and restart navigation to get next fast route