The best thing about zInstall is that it works perfectly even with large volumes for both client’s end users as well business processes like eProcurement Management System(EPMS). We have used this tool to migrate more than 100000 clients from one EPms system into another without any hiccups at least till now which I believe will continue forever! No comments here because there are no dislikes yet but if you want complete migration then do not hesitate go ahead otherwise just try once before buying! Just make sure your target systems supports 64 bit windows operating software so don't buy anything else other wise u might face some issues while migrating those servers using 32bit OS's. Migrating multiple server environments within our organization has never been easier thanks to its ability to seamlessly transfer user accounts across different domains/servers etc - we were able save over 10 hours per month by doing these operations manually previously!! The migration is straight forward with this tool as it follows standard MS guidelines to be used for system level migrations, however there are some quirks here that I have yet figured out how to get around. This product does not support file/folder mappings which was one thing we were looking at using when migrating our Exchange environment over. We use these tools extensively across most sites but their capability really shines through once you find something they do well!