You can specify which components/urls should be forced to use https and which ones should not. An absolutely time saver (!) and perfect for people who do not want to mess around in the htaccess file.
The product is easy to install, and the looks of it are clean.
There is a lot of documentation but the support is unfortunately not the best. It might be temporarily due to lack of enough employees but you would expect more since it costs quite some money each year.
If you don't need to create new fieldtypes and are comfortable with css then you probably won't need support very much anyway as the product is pretty straight forward.
The only negative thing I came across with the product itself is that sometimes with a new version update you have to set up all the layouts again (it would be great if this could be automated in some way) otherwise you end up with empty pages on your site.
Therefore you have to put your site offline for at least an hour, plus make screenshots of all layouts before you update the product. So keep in mind to document you app well. If you do that then ZOO is an excellent product to work with and easy to understand for end-users.
Even though there is little information on the site itself (it made me hesitate to buy the product at first) the documentation is clear.
The support you get is superb. They even added new features on request.
If you follow the documentation you can easily add extensive filter/search methods to your ZOO site. You can set search filters on all kinds of fields which makes it a perfect tool for product catalogues or recipe sites.
Because you can filter on any field you want with ZOOFilter, you don't have to put all the filterable fields in the ZOO Category field anylonger.
This also makes your life as a webmaster easier when adding new ZOO items via the back-end (no longer scrolling in that long list of categories for selecting all items in different subcategories!).
I can personally recommend this extension to any ZOO user.
It is definately worth the money.
The documentation is good and the support you get on personal tickets is absolutely perfect. Very willing to help out.
I even noticed that the product gets updated based on previous questions: things that were not possible before (very few things are not possible with this tool by the way) are implemented after a short while.