Nice.
In addition to being the only free online images of Amsterdam records that are easy to navigate (using the Amsterdam Stadsarchief indexes as a guide), you can often use the same approach with the indices provided by many other local, regional, and provincial archives when the archief does not have the image available or when it is a poor quality. When I just want to pull up a record that has been cited elsewhere Zoekakten is usually my first stop and Genver2 is my second as there are some different materials indexed on each site.
I would also add some more emphasis on the value of the two plaatsnamen tools, the one native to the site as well as the Histopo site - neither one is a complete list - places that no longer exist are often missing, but they are still extremely helpful both when you are trying to decide where to look for records and when you are trying to decipher the place names in records