This was some of my comments when I received my Pentax Slingbag.
https://www.pentaxforums.com/forums/pentax-camera-accessories/37413-pentax-sl...ny-images.html
By the way, that looks like a fun little tripod included in the ebay auction in your link. I am not saying that you should or should not get that bag/tripod/other stuff combo but I have seen more than a few places around the Internet, on this forum and ebay that sell the bags for around $30.
It is also worth noting that a few places around the Internet have reduced prices on the Lowepro 200 Slingshot. These bags can be had for $50 and that includes shipping. A very good bargain.
A lot of people are very satisfied with both bags. I take mine almost everywhere.