Our site works in all resolutions?

Our site works in all resolutions?
Many webmasters often think that your site works properly, but sometimes in certain resolutions that may fail in several respects. The display quality of a site is extremely important because a poor quality site with a presentation that takes the visitor to leave the site soon.

First of all we have to know which resolutions that visitors use to it there is nothing simpler to use Google Analytics to find out the resolution of our visitors. The Google Analytics provides a tool to verify the resolution of which visitors saw our site, to access this option is under "Visitors -> Browser Capabilities -> Screen Resolution".

In the picture below I can see that 33.90% of visitors that this blog has this week used a resolution of 1280 × 800, 16.53% and a resolution of 1280 × 1024. It is important that our site works in all resolutions but sometimes this may not be possible, then it should work for the largest possible percentage of visitors, which in my case would be 5/1 that would give me about 89% of visitors viewing the site in perfect condition.

But how to check if the site works in these resolutions?
The site ViewLikeUs is a site that lets visualize our sites in several resolutions to this simply inserting the URL and choose the resolution you want to see.

Your websites and blogs work at all resolutions?