I suspect that authentic crittle doors, with thin steel frames, look amazing especially as an internal divide where you want to zone a room but not block it off completely.
But unless they're authentic or at least steel I'm a bit mixed about how they look as an exterior door. With enough light and thin enough frames they can probably look absolutely lovely, I do like the look. But with the thicker aliminium frames, would the extra light and space created from not having the bars not offer more?
Ultimately, what's lovely about crittle is their heritage, and before they were so on trend, I'd imagine seeing real crittle doors in a home would be unique, a real design feature. Can we say of the aliminium ones that are now everywhere?
I'm asking because whilst I have said all the above, I do still think about them. But I can't afford real crittle so I know ultimately, I'd go for an option that offered more glass/light. But I think we can safely say the crittle look is a trend and not a unique design feature, but trends can stick around for a while.