Not too sure about the one you listed. If you could get a model number or a link that would be great.
This is the one I have and it works flawlessly! Haven't had any issues with it, everything was clear, sometimes pixelated, but you could still see me very well.
In any cam you get, there will be some sort of lag between you and the picture due to your internet and computer specs.
The main reason why the more expensive ones are, well, more expensive, is that they have a larger megapixel camera on them, so you get a somewhat clearer picture.
But really, any cam should be fine for you. The norm for mega pixels is 1.3 I believe. Some do have more, but they will be up in price.
Hope this helps somewhat.