This script, and others by this author, are extremely easy to use and provides great flexibility. The quality of the code is outstanding, NOT a HACK! The author is very helpful and has created a suite of similar products that make true "Plug-n-Play" functionality available for site developers. All at a VERY reasonable price and license. I recommend this to anyone wishing to develop sites and offer some of these more advanced high-quality, robust, fault-tolerant features easily. Plus, they include an admin utility too as standard!