I have recently switched from Garmin to Waze.
It is clear that Waze kicks Garmin's butt.
Two suggestions though:

1) One thing I used Garmin a lot for was to tell me the current speed limit. It has it in very legible text that I can take a quick glance at to see. Unfortunately, the text on the waze app is too small for me to easily see with a quick glance. Ideally, this text should be enlarged.

2) I am admittedly used to Garmin's voice timing, but the waze timing for turns was a problem for me. It seems that Garmin would tell me three times -- turn left in 1/2 mile -- turn left ahead. The last "turn now" warning was sufficiently ahead of the actual turn that I could see the turn and make it. The final Waze warning is too close to the turn -- I went by several turns because I practically would have had to slam on the brakes to make that turn.

Again, I was very pleased with the waze app! However, as good as it is, fixing these two items would make it even better. Thanks for having this suggestion box so I could pass along my inputs...