There aren't any "tricks" involved in this offer except for self-admitted fact that all hosts that offer outrageous amounts of storage and bandwidth are overselling. Here's what Josh has to say about overselling..
This is $3.95 a month unless you get a free one from a promo code.
Are you transferring from another host or from wordpress.com? How many plugins do you have? It won't be hard, but it will be much easier if you're familiar with setting up wordpress, copying files over, and backing up and restoring databases. If these kinds of tasks sound daunting there are other easier methods that require you to export and import articles but which also means more time reinstalling plugins, etc.
I think support is remarkably good considering how little I pay for it. Read the forums here and you'll get a good feeling for the worst case scenarios - the people who've had the worst experiences invariable post about it here.
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