Has anyone used the International Rail online booking service.

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Has anyone used the Australian online rail booking organization called International Rail . If yes are they reliable and reputable.

Never heard of it, but from the first look it does seem a lot like one of those multiple resellers of rail passes & tickets, which usually charge rather high commission for their service. From our experience we do not recommend to use such "companies", simply because in majority of cases passengers can purchase trains tickets or passes either directly from national railways or at least from 100% official distributors, thus not paying the middle man
Anyway, maybe we can help with redirecting you to any official national railway website or consulting on some specific ticket/pass fare etc.?