I am a NCE user myself since 2007 but was trying to help out a Lenz user from QLD & at least 6 local mates here in South Aust are Lenz users - I even have a Lenz LH90 controller to use on their layouts....
The contact you have is correct. Sometimes Peter takes a few days to reply.
Lenz has been a little slow on improvements and upgrades over the last few years, but in the last six months have released an upgraded hand controller and upgraded its main system box. There has been an upgrade offer where you can upgrade the LH90 and LH100 controllers to the LH101. The LH101 is a very compact controller that is a very nice physical size that is considerably smaller than the NCE Powercab and also neater than the Cab06.
The new controller is a considerable improvement over the previous controller with alot more information in the screen. It is much easier to use, and the locomotive programming more easy to work with. The loco memory stack is easy to access. You can download the LH101 manual on line and read it if you want. It is worth reading it to see what the controller van do. You are able to control many more functions on more modern DCC chips with this controller.
If your system is Version 3.5 you need to upgrade to version 3.6, but Peter can supply an exchange EPROM chip that you just plug into the socket where the old chip sits.
The Lenz system appears to allow you to use more cabs with the basic control box, LZV100 than the NCE systems do. I currently have 7 LH30 and 2 LH101 controllers operating with my LZV100 box. From my reading of the NCE manuals the SB3 and SB5 units limit the number if cabs that can be added to your system.
From my initial use I feel the upgrades have certainly made a vast improvement to the Lenz system.