They charge a ridiculous fee for texts.

You can't give multiple people access to your account, which is really important given we use Pingdom to notify multiple people... If someone wants to change their contact info, I have to do it.

You can't set individual notifications. For example, I want to receive push notifications to my iPhone. David would prefer to receive emails. We can't enable one style for one person. Instead, I have to receive his emails and he has to receive my iPhone chirps.

The iPhone app is amazingly buggy.

So, why do we use it? Someone recommended them to me, and we've already paid for it. I just assumed something that expensive and oft-recommended would be better.