Trackers from Trackstar and Scorpion

[Outliar]

Just renewed insurance on my 993 C4 Coupe with Adrian Flux, and asked them about trackers and they put me onto Gap Security who stock trackers from Trackstar and Scorpion. Has anyone here had experience of Gap Security and/or these two tracker firms?

They offer Thatcham Category 5 and 6 product options, any views on the differences?

I had posted an earlier message here, and some of you kindly told me about Viper and Cobra, so I'm just looking at these as alternatives.

Many thanks.