We have been using IndyCo explorer to model our database design, it's very easy-to use tool that helps us in designing complex models quickly without any hassle or errors! I think there is nothing much which can be disliked about this software as compared other similar tools available out here. It would definitely help you if you are looking forward towards an efficient way while modelling databases designs like ERD diagrams etc., so i recommend everyone who wants some good features at affordable rates should go ahead & try them all before buying one! The best part was its compatibility across platforms (windows/mac) too!!