Definitely a must to use. Based on Belgium's telephone book. You just enter the surname and click the subnit button. This can be useful for strategy and pin-pointing the regions for your research. Comprehensive links also to The Netherlands including search facilities.
Basic pages are in just about every language.
No actual research can be done by them but they can point you in the right direction. Visitors to the site may express their research interests in the guest book. A search engine can indicate if your surname has been mentioned. Free search engine 'with soundex' option. You can view other queries.