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I've used it quite a bit with architects and the experience really depends on what you expect from it. What works well is that initial brainstorming phase - you generate three layout concepts in minutes and then keep refining them. But there are always some annoying issues: the AI tends to ignore local constraints (like ceiling height or existing windows), and then you spend time fixing what looked right at first glance. Basically it's a tool to speed up ideas, not to replace someone who actually understands the space.
I've never used AI for that, but from what I see people saying, it works well for generating initial ideas and exploring concepts quickly, but you end up spending time later refining and correcting because it lacks that human judgment about what actually makes sense for the project.
Don't fall into the trap of thinking AI will generate a finished project - in reality, it usually produces pretty generic stuff or makes proportion errors that you only notice after poking around a lot. The biggest issue is that you end up spending more time fixing structural details than you would if you'd built it from scratch, because AI gives you this false sense that it's almost done.
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