http://www.ezitrak.com.au/, I found this unit to be the best around and you can momitor it yourself so no annual fee plus you can kill the engine anythime rather than them calling cops follwing the car and then cut the engine when they think its safe . Sure it won't work underground but it will give you the last "known" location ( when it went of satelite sight). Will work anywhere on the plannet however it won't call you if there is no GSM cover but as soon as it goes in GSM cover area you will get a call.
Running cost is the cost of a SIM card, you can get a pre-paid or a low fee card like $9 per month .
QT only works in merto areas, uses a lot more power so if you don't drive the car for a week or so battery will go flat, its a much bigger unit ( harder to hide in the car) and needs a better aerial.
It can even save you from the cops as in this case . http://www.ezitrak.com.au/aa-News.htm http://www.policespeedcameras.info/news_nsw1.html
GPS BEATS SPEEDING FINE view ACA Video
URGENT PRESS RELEASE
AUSSIE MADE GPS DEVICE BEATS NSW POLICE
Sydney driver Michael Simotas was charged with speeding by police officers using a handheld radar, allegedly doing 85 km/hr in a 60 km/hr zone.
But Michael had a secret weapon in his car – an EziTrak® GPS Security and Tracking System. Michael was able to download the black box from his EziTrak® unit which provided accurate, tamper-free data of the vehicle's traveling speed, position and direction.Through this data, Michael was able to prove that his vehicle briefly touched 61 km/hr at the time he was charged but was mostly traveling at 57 km/hr.
During the subsequent case and appeal, a GPS expert gave corroborating evidence and attested to the accuracy of GPS and the inability to tamper with the data. This is the first case in NSW where GPS data has been admissible in evidence to contest the accuracy of police radar.
So what is EziTrak®? EziTrak® is a security & tracking system which gives car and vehicle owners personalised, self-monitoring with no ongoing back-to-base fees. EziTrak® utilises GPS and GSM technology to give the owner instant tampering notification, control, tracking and emergency alert information over the phone.
EziTrak® has an internal Black Box Recorder logging speed, position, time and date from 1 to 255 hours. This information can be downloaded to a PC and then played back on a moving map display. The data is accurate and cannot be tampered with.
EziTrak® was designed by Sydney based company Rojone Pty Ltd. EziTrak® is manufactured in Australia and is sold throughout the country as well as being exported to the UK, USA and many other countries.