After spending a lot for a Rowenta and it leaking within the first year, I am over the expensive irons...however, if I ever bought another expensive iron again, I probably would not put water in it. Make it a dry iron only.
I have found that ironing with steam warps my seams anyway.
The Oliso looks like it's a great iron. After being out for several years, I would think they have "ironed out" the kinks. I'd say go for it.