Has anyone had any luck with scene controllers?

I think you could do your example with a SmartApp and a regular zwave switch.

But, if interested in more buttons, consider this. Just installed one (with a simple command strip) and I may install others around the house. Cheaper than the Leviton controllers - can get more than one for the cost of a Leviton. And, the form factor is actually quite good. I’m REALLY picky about how things look and I think it looks fine.