Multisite order and product management

Hi! In the process of moving our 2 shops to wp I´m trying to find the best practice for managing products and orders across a multisite set-up. So far I´ve found and tried the Multistore plug by Lykke (and it seems to have it´s flaws). Having gone through all of your plug-ins I haven´t found anything that addresses this problem head on. So, what would your recommendations for best practice be?