I like:

0) The use of a set of different phone numbers instead of different conference rooms.

I don't like:

1) Why only a US number, when people are used to freeconferencecall.com, which has access numbers in many countries?

2) Why make someone visit a web site to set up a call? Isn't the user's calendar (e.g. on their mobile) the natural place for them to set up virtual meetings?

3) Why do I have to enter the PIN manually? RFC2806 defined pause and wait characters for URLs, back in the year 2000: https://www.ietf.org/rfc/rfc2806.txt

Also:

4) The link on the bottom-right of the page leads to https://emerge.cisco.com/ but that server is refusing connections on port 443. I can connect with plain http.