Wonderful tool, if you have to display many tables in hierarchical style. Ultragrid also supports adding of new records. Because UG is different than all other grids (and we have tested many) it was an advantage for us, until it exactly had the feature we needed. The COM interface is very well structured. The structure of the properties is very deep and allows very many options to set. The only really disadvantage is that you have to obtain a machine specific code from Infragistics. This goes automatically over the Internet, but only twice. After the second installation you have to call the helpdesk of Infragistics. So read the conditions before you buy. In the meantime we bought a second license until the tool is really good and I enlarged the development team. Because of the licensing behaviour only 4 stars.