Personally, I think that Hornby has made a huge mistake entering the DCC market in the way they have.
If nothing else, Marklin and Fleischmann have taught us many things. Fleischmann operate in the 2 rail market, introduced FMZ which was successful, however they were not dealing with a captive or dominant market and admittedly while there was nothing wrong with FMZ, they were unable to match what the DCC world was doing and subsequently moved to DCC.
Marklin on the other hand are a dominant player. Unfortunately they lead and others follow. The Marklin market is huge both in numbers and spending ability. Most European manufacturers (ie ESU, Zimo, Uhlenbrok) make high quality product that is compatible with Marklin's standard. Do not lose sight of the fact that there are two DCC standards out there, the NMRA/NEM one and the Marklin one. I would say that they are both pretty equal in terms of dollars/euro's spent.
Now Hornby have decided to enter the market. Like Marklin they are a dominant player, unfortunately they are entering the game so late (like 10-15 years late) that they think that they can either lead and other will follow (sorry their offerings are nothing special) or worse yet make the NRMA/NEM DCC standard but from reading reviews of the stuff and talking to some electrical engineers, it is doing so but only just.
Are they serving the "Hornby" modeller well, that I suppose is up to you to decide.I do think that rather than coming in at the bottom end, they should have at least aimed for a mid range type product aka NCE or Digitrax, after all how many people by Zimo.
But by this stage, any decoder that they sell should work with any NRMA/NEM compliant device. Forums like this are unfortunately showing otherwise.
John