I looked at a number of DCC Controllers over 10 years ago and settled for 511. Since then I have a 611.
Both are linked. The 511 being a slave.
This is a great improvement on the old 511.
Yes ZTC did go through a period of disruption but is more stable now that the new owner is committed to its development. Plus you have dedicated phone support.
Why does it suit me. I have a problem with grip, so an hand held was out for a start.
I like its design, not to many button presses to operate. It reads and writes.
A new larger screen is on its way, you will be able to link it to a monitor on the wall if you wish.
I know its costly, but then if you can afford it why not.
Why buy a mini when you can afford a Jag.
By the way, its BRITISH.