Any advantages to using this other than ShieldsUp (which has been around longer than I've probably been alive)?
It looks cooler - and eventually shall have more features and better explanations. Isn't a bit of change always a good thing :-)
Sure, but don't just steal the Shields Up content! Your description of port scans has been copy-pasted from Shields Up. Your disclaimer text is identical except that "Shields Up" is replaced by "CheckMyRouter"...
Hmm thanks for that feedback. The site is really just getting started so certainly there are some rough edges; will rewrite the disclaimer part and shorten it while i'm at it.
PS: Updated the common portscan description. Also, feel free to get in touch and make it better / more useful.