My final note on this:
Personally I don't have to "justify [my] own decisions" by recommending it. I passed 1st time. It worked for me. Your mileage may vary....
I recommended it coz it's cheap and freely available and most people probably already have it installed. I used it as a tool. It almost smacks of snobbery when people say you have to use the "right aviation software" and "it's only £80". Well, do we not pay enough in this industry already?