Note, the original poster asked for a
good GPS tracker - not cheap, not easy to install.
So...
TrackmateGPS ,
https://trackmategps.com/ , is popular with some owners of luxury cars.
My suggestion would be to have the following professionally installed:
https://www.amazon.com/TrackmateGPS-Tracker-Real-time-hard-wired-contract/dp/B00GA98XAE/
TrackmateGPS DASH 3G GPS Vehicle Tracker. Real-time, hard-wired.
by TrackmateGPS
Price: $79.99
For Canada operation, see:
https://trackmategps.com/profile/Faq#item_3
This is not a free service.
The plans cost between $9/month and $30/month (USD) (5mins vs 3 seconds updates).
https://trackmategps.com/profile/Subscribe
If this makes sense for someone's car, that is their decision.
Imho, some cars are a target for thieves. Some cars are stolen to be stripped and sold for parts. Some are stolen for joy rides. Some are stolen to be sold/used.
Trackmategps also makes mini trackers. But, those must be installed in the correct orientation and a place that is not covered by metal. For some cars, the front/rear bumpers
may work.
I hope the above helps.