The only issue I faced was a while ago. My card was debited, or rather it was showing as debited when in actuality, it did not debit my card. After six months, they came back with back billing. Somebody should have verified the billing and immediately informed us. So yeah, However, six months is too late to identify such fault sightings. When I want to analyze the information, it would be better, since Google knows what I have used, to only show those items for analysis purposes. Especially when I look at a previous month's billing or usage across services. It's better to show the services which are used, not everything.
