I wont comment on device. there are many types of device.

The search function in Garmin beats all. I have installed TomTom/Papago in iPhone to try. what a shame ! I cant search road number.

Garmin on my OLD HTC phone beats them away by the search function alone.

PapaGo prompts a annoying, its keep talking.

Getting satelite fix in 5-10 sec isnt big deal if you think practically. it takes little longer when you are moving.

Navigation wise as long as it shows you the road should be good enough dont expect these GPS device to tell you drive which lane too.

Finally if you buying dedicated GPS device, buy most cheap Garmin model. Trust me you dont need those fancy feature that makes you to pay 1k+

btw using GPS almost 4yrs.