It's been there for a long time. I've been quoting them when referencing price history.
One thing it's lacking is a way to search across regions (regions as selected by you). If I want to compare prices, I will need to do a search on US price, Canada price, UK price and SG price individually.
It's also lacking in some intelligence when showing the price. For example, it was showing a certain AAA game as FREE, I thot it's a pricing error but upon inspection, that game entry is indeed free but it can only be purchased if you already bought the "pre-order ticket". So the site doesn't know how to recognise or present this.
Regardless, it is a very useful tool that I reference frequently.