I have two routers, one of which is the Vigor2700Vn. I have connection problems with the Vigor which are not present when using the other router, therefore I conclude that this router is the source of the fault. Here are the symptoms.

When receiving large attachments via e-mail, it hangs.
When playing flash videos such as Youtube or BBC Iplayer it hangs and then resumes a few seconds or minutes later.
When downloading large files, it hangs.

Suggestions gratefully received

I'm getting the same issues, the wireless simply drops out.