Lots of options, 3 in 1 product!
This is a great product that really combines three major features that can be useful to any SharePoint implementation. You can do cascading columns, two-way lookups for order entry systems and simple cross-site lookups all from the same product. The skins are a plus, and there are a ton of options when you configure your lists with this field type. This product receives 4 stars though for the lack of documentation and the problems encountered when using site templates. If these two issues are addressed, then it easily becomes a 5 star product.
Two-way lookups, which are useful for a customer's order history
Cross-site lookups of any list
Convert standard lookup fields to cascading plus fields
Many skins to choose from for the drop down lists
Compatible with FireFox and Chrome
A tad pricey for most just looking for cascading columns
Had a lot of trouble using cascading columns with site templates