Describing the Lenz SET100 as 'old' is a little unfair. It's true that they haven't updated the casework but they have added features with new firmware and continue to drive the standard to some extent. I've always had Lenz command gear; when I started it was the only system that worked on both the MOROP/NEM and NMRA standards. Even now, with the standards largely unified, the reference is the Lenz gear...
I have to admit that ergonomically the LH100 sucks though it does have a lot of use on a larger layout, it has a great deal of functionality. For driving locos and switching the odd point the LH90 is a much better controller with it's dial. Mind you, the LZV100 (Lenz command station) opens up some interesting options such as unleashing the full potential of the Multimaus. The latter is probably ergonomically the best and most intuitive DCC handset on the market currently...
Guess what I use?
Steph