The ability to easily integrate our store's POS system (Voyo) into Salesforce makes it very easy to pull inventory information from within sales reports or other applications that run off of SFDC like Hubspot! There are some things I dislike about this integration as well - sometimes there can be an issue where we have multiple instances open at once which causes problems when trying to link them up correctly.
We've been able to fix these issues by closing out all but 1 instance before linking so far though. If your looking for quick updates regarding what stock items need replenishing then using this tool has made managing my team much easier than having to manually go back over each transaction to check if something needs restocking.