As previous posters have said, the system works well, but the control surfaces are difficult to use, with many small buttons all the same colour and very closely spaced.
If only they would redesign the housings to make operation much easier. The entry system DCS50 called the Zephyr has just been redlaunched, called the Zephyr extra. Digitrax could have made a great leap forward facilitating easy operation, but they have kept the design concept the same.
Do many of you remember the Sinclair ZX80/81/Spectrum and the horrible keyboards. Well, Digitrax isn't that bad, but there was a huge supply of after-market add-on keyboards for the Sinclair's...if only someone would do something similar for Digitrax.
Just look at the modern Hornby Select..it has large, multicoloured buttons, easy to navigate. Mind you, I don't like it technically.
Going back to Digitrax, one of my friends has made layouts in OO and TT using a combination of Digitrax units, ending up with a DCS100 command station, two DCS50's and two UT4 slave throttles, along with Digitrax's point controllers all wired on one control bus. It worked really well, without any serious issues. We did agree that the next layout would have touch screen point control, but he's moving hose, and all layouts are now dismantled.
I have seen a temporary outdoor layout run with Digitrax ( Alresford vintage train show ), but I suspect pressing the correct buttons in the dark would be an issue!
Malcolm