We've had some of them
We've had a few of the Gehry pieces. Never had an issue with them coming apart, though I've seen others that have. I suspect that a lot depends on the environment where they are kept (temperature, humidity, sun exposure).
We currently have a "Poweplay" lounge and ottoman. Like the other designs, it's not uncomfortable, but not a chair you want to relax in for long periods. It's closer to functional sculpture in some respects. I suspect your height, weight and personal preferences would dictate how comfortable the chair is to you.
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