Booker allows you to search by the customer's name, email or phone number and merge all accounts together instead of having to do two at a time. Also, once you've selected all the client profiles to merge, you're provided with the date each profile was created, the last time it was logged into by the client and links to all the orders associated with each account and shows you in a single column which information you've chosen before merging. This also allows you to see which account was used most recently in case you are merging profiles without the client present