Best Websites on Delicious

What are the advantages of storing, sharing, and tagging web content this way? What are the disadvantages?

I see advantages in the tag bundles for finding several sites that relate to the same topic. An example of this would be the CITIZENSHIP tag bundle that has 15 sites in it. I liked the option to browse these bookmarks (found in the top right portion of the page). With this, I can look at each of the bookmarked sites.

A couple of disadvantages that I found were:

1) It was fairly easy to leave the CPL portion of the site and get into the rest of delicious without intending to do this. This happened to me when I put a tag name into the "search delicious" search box. It would be nice to have a search box just for the best websites section.

I also accidently found I was out of the best websites when I clicked on either of the options in the "See more bookmarks in Popular or Recent." section that appears just above the "CALGARYPUBLICLIBRARYFAVORITES" blue tag.

2) Another disadvantage is that there are 463 unbundled tags at the bottom of the tag bundles list. When I clicked on these, I found 49 pages with 482 bookmarks included in those pages. I found this quite intimidating. Even if I were to look at each bookmark, how would I remember where a particular site is when I wanted to access it with a customer? I realize that these bookmarks are in alphabetical order, but I need to remember the exact name of the website to find it easily. For example, if I look under Shakespeare, I will not find the site I want because it is called Absolute Shakespeare. Granted there is a tag for Shakespeare, so I must learn to access sites this way.