As the team investigate whether we always get value for money, there's an exclusive peek at the tough tests designed to identify which products are the best to go for. Also, with hundreds of millions of batteries used in the UK every year, how can you tell which ones will last the longest, and could it be that it's cheaper ones that give the best overall value? Plus a big family day out accused of not living up to the hype, and an online dress shop whose frocks don't quite measure up.