Limitations of Amazon RDS's Trial
===

I'm not sure whether this is the right place to ask this question, but I'd like to give Amazon RDS's trial a go. Previously I've used Microsoft SQL Azure's trial and they cut me off as soon as I overshot the limit, preventing me from paying a single cent.

However, with Amazon RDS's trial, it seems that I will be charged as soon as I exceed their limits. I'd just like to know if there's anything in particular I should look out for, that I might miss out, and be charged because of that.

Of course, I'd prefer it if there is a way for me to prevent me from exceeding the free-of-charge limits.

Many thanks...