You can connect the Houston via MIDI, so it works independantly of the OS.
Seen as the Houston has been discontinued quite a while ago, I doubt it very much that Steinberg will repair it when something is broken.
I bought my Houston a couple of years ago and I’m very pleased I did.
It’s not the most accurate controller in the world (especially the faders) but, to me, it’s a cheap alternative to an MCU Pro.
However, before you buy it, I suggest testing it. Especially the jog wheel and the touch sensitivity of the faders might have some problems.
Don’t forget about the Ipad. I use it with AC7 Core (MCU emulation) and mostly with Touch OSC with my custom layout and a Cubase generic remote. The Ipad and Touch OSC is the best controller I’ve ever used. I control RME Totalmix and Cubase (selected channel) and becuase of the touch screen, it’s like having as many controls as you need.
It’s funny, I bought the Ipad (1st generation) just for controlling Cubase but it’s so great for pictures and, Garageband for the Ipad ($4.99) is bloody amazing!