It's not necessarily bad, but there's better money elsewhere.

There are definitely other sources of analysis which are as-good or better, and don't expect cash from you - I definitely wouldn't have used stratfor in the past if my university didn't have a subscription. As a source of international news it isn't worth it, and its emailed "briefing" thingies weren't helpful. Other services - and think tanks - give email news/analysis roundups out for free, and those are usually better.

As for the differences between it and other sources - Stratfor (usually) costs more, and presents itself as an "intelligence-y" resource. I'd place it somewhere near The Economist in terms of breadth.