I like this solution a lot, it is very easy to use and has helped me a lot in my business. I have experienced problems with the CSV upload it did not work with it's own product export but other than that i have nothing to complain about. I know it does not officially support Joomla! 1.5 yet but I discovered in legacy mode it does work if you replace the php on line 19 to read
global $mosConfig_absolute_path, $product_id, $vmInputFilter, $category_id;
after that it works with everything except front end administration.