You are right not all trackers are equal. Apart from the usual 17track, I have tried a few more like trackingmore etc. But, once the package landed I was using the RM tracker; although found out that the status does not move beyond "HEATHROW WORLDWIDE DC, ARRIVED IN THE UK" until it gets delivered, which is obviously not the shipper's [FT] fault. I am going to give it another week or so, before pursuing it any further.