Nice service. At the moment, I have set a couple of billing alarms which trigger at certain thresholds, so that I know if we are going to be over budget by the end of the month. But a daily report would be handy.

Our usage is fairly low (~$1K/mo), so even the lowest pricing tier is not within our subscription budget now, but I can see it being so as we grow.

One question (I haven't gone through the specs in detail) but does the daily email provide other hints on saving costs as well (i.e. alerts when a reserved instance expires etc.)?