Hi Shummi,
I have both Datatool S4 and Tracker Monitored on my bike and the main thing I have found is that the battery doesn't last long....
In all seriousness, I found out after I'd gone to the bother of 'activating' the tracker subscritpion for £122, that there is a mximum Insurance discount that can be applied to any policy, e.g 20%. My insurer said that my alarm accounted for all that as it was a top spec, so my Tracker had no further discounting affect on my policy. I do know that I have the Tracker for piece of mind now though, so all was not lost, depends what price you put on that.
Fortunatley I can't report on the finer performance aspects of either the alarm or the Tracker as security features as (to my knowledge) they've never been used. The Tracker is very unintrusive tho and save for the battery issue, you wouldn't know it was fitted.
The alarm is ok, once you get used to operating it and working out where 'ferry' mode is and when it's active and so on. This is useful for washing it or when it goes into the workshops.
You must get an Optimate or similar though, or your life will quickly decend into a quagmire of swearing and bump starts....
I did have one small issue with the alarm going off for no reason at all. This happened about 4 times all in all, once (or twice) outside Windy Corner (popular Triumph dealer), which needless to say led to alot of p*ss take from Triumph owners about Duke electrics. The fact it was the british alarm that had gone t!ts up didn't seem to matter to them..

Still that issue seems to have gone now, no idea what it was... and the fob turned it off as per usual.
Hope that helps,
Cheers, Jim