I have two Boomerang GPS trackers for both of my Radrovers. They are $200 if you get your own data plan or $250 the 1st year if you get their Verizon data plan for one year with the unit (assuming you will just need to renew the data plan for $50 after the 1st year). I had the two units since Nov/16 and it was mostly because we travel with our ebikes. I was worried at a hotel on the road and someone stealing the bike off the vehicle bike rack if we couldn't store the bike in the room overnight.
The system uses the Verizon cell network and a smartphone app to track, arm, and disarm the boomerang unit. The alarm will sound in a few seconds with movement. You can't arm your bike rack and drive down the road; only when you park, arm bike, run your errands, disarm bike, and drive away. I don't use the outside bike rack at work (store/charge in my server room on 2nd floor); but, I imagine the boomerang might alarm if the rack and bike was bumped enough.
You will get a smartphone alert when the alarm is triggered along with the audible alarm at the bike. There is a web-based app to track your unit. You can't arm/disarm or receive alarms from the webapp, only on your smartphone. You can just google map track and look at metadata collected on your ride with the computer based app (trips, mileage, carbon offset, map location, battery level. device temp, signal level, etc...).
The unit does have trip data logging; but, it is about useless. It starts/stops/records on its own and there is no way to start/stop trip logging like you can with other bike apps. A 2 hour ride might be broken into 2-4 trips with some bike riding time not even being recorded and other time like the bike on the vehicle rack driving down the road included in the with some of the trip time. I just use the Boomerang to arm and track my bike position only. I use free iPhone app like Endomondo to track trip data.
The unit looks weather and dust/dirt resistant. The only place I can see being a problem is the micro USB port used to recharge the unit. I make sure the dust cover is always closed for the USB charging port. I can usually go about a week between charges. The unit uses more power with the bike on the move compared to stand-by mode. I might be able to go 2-3 weeks in stand-by mode. The unit still reports your location in stand-by mode.
Mounted on the down-tube of both Radrovers with a Zefal DT Armor MTB frame guard for extra water and debris protection:
(Link Removed - No Longer Exists)