The Tracker is the beacon that changed everything. It was the first beacon with a digital processor. It made it much easier to locate than an analog beacon which was the standard at that time. It also really hasn't changed since it's debut (<2000 I believe). So it is a reliable beacon and gets the job done. A 3 antenna beacon like the Pieps DSP is a bit faster, has much better range, and pinpoints a lot better than the Tracker.
Another company you might look it as it's probably available to you is Arva. I have an Arva Evolution beacon that I frequently use and I still love it. The harness is part of the beacon design, you have to turn it on to wear it, and it's very simple and easy to use. I am a big fan of simplicity and their beacons are some of the best designed from that standpoint. For whatever reason they can't seem to get a foothold in the US, but the are one of best manufacturers of beacons in the world. Worth looking at.