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Full user review
"I've used Tinderbox over a year and love it."
Though it does have a steep learning curve, you need not learn everything at once. I found it can be used for simple things, and learning goes along with the ideas to take things further. I wrote stories in it, exported to html for website use.
I would say that the inability to include images is for me its biggest drawback right now. The other thing I'd like to see is guard-field linkability. And yes, it takes a while to explore and discover all its potential, but that doesn't preclude use.
I've found the Eastgate folk to be extremely helpful and courteous, and quick-acting when contacted. There is also a forum for help with the designers themselves checking in, and there are some great resources at the Eastgate site. They are constantly tweaking and bettering the program, which may be annoying, but it means that bugs are fixed, upgrades are made, and new versions are free for a year, very reasonable after that.
Overall, I think Tinderbox can be just about as simple or as complex as a project demands.