Google Shopping Tool - Opinions?

Does anyone else use the Google Shopping tool? I use it for miscellaneous low value consumables that do not have a dedicated vendor, & I find it very useful to see all of my options & find the best list price. I also use this for personal purchases & price comparisons. In my opinion, it is a functional tool & the interface is great. I do not see many downsides to using this, but I would like to get other people's input! What are other people's opinions on this tool? Do you use it? If so, how do you apply to your purchasing methods? https://www.google.com/shopping