I use Waze everyday for travel to work, and also use it for long distance travel.
For long distance travel it has saved me countless hours more than once being stuck in standstill traffic due to accidents etc, as well as informed me of the hidden popo. Sometimes i dont listen to it, and i regret it instantly when i see a stream of brake lights
I must admit though with Waze, it seems to "save" a preferred route if you go a certain way more often than not. Some days i do challenge it, and end up getting to my work destination 10+ mins earlier than the route it initially provided me.