I’m still running 2 fgsd-002 here for 4 years now, have had no issues as of yet.
So I would still recommend them 
.
Have no experience with smart smoke sensor further, so can’t help you further if you want experience.
But I can image you’ve lost trust in them this way.
I only know several z-wave brands that are supported currently:
Fibaro, Popp, Heiman (z-wave)
