Hi bob3160,
I have that extension in GoogleChrome and I use it additionally to avast Webrep, WOT and webutation.
It has found issues on sites other scanner did miss. But it is as with all web rep extensions and DrWeb's AV Link Checker as well, you like to have them inside the browser or you would rather stay without.
Just as with dashboard lights, some are minimalists, where other are not. By the way I like the "click to show" function of the Traffic Light Interface and bitdefender's website scan is renowned, and is part of the online VT URL analysis tool,
polonus