So wanted to give an update. I've gotten three alerts and oddly enough the Canon email has arrived 1 minute after I get my own email each time. Which is saying something since I'm only checking every 5 minutes currently. Something else I noticed this last time since several products came back in stock at once is that while I got five or six emails from my script, I only got one from Canon. In my other email account I got an alert for another lens. I don't know if Canon is limiting users to only one product per email address to be notified or what but it's an interesting development. If anybody has any input on which is faster or if you only get one email from Canon or anything like that I'd love to know about it. I am planning to add in a history of when each product was last in stock as well to make it easier to find patterns and how long a product is out of stock on average.