We have been using clearmdm to manage all of our contacts in sales force, which is very helpful as we are able add/remove contact info without having access their profile or any other data that may be there with them through some 3rd party system like LinkedIn etc., It's quite easy once you've used it few times! Nothing at this point but I can say they will continue improving upon themselves since its already good from begining so not much improvement would required hence keep up your side if things go smoothly otherwise maybe just wait till next version comes out!! The best part about clearing MDMs (SalesForce) was getting rid off many issues regarding duplicate entries when adding new people / removing existing ones who were previously added & removed before - This has reduced drastically my workload by more than 90%.
Managing multiple companies within one org also became easier now because i am managing everything under 1.