There are no limitations on either users or number of records when using ACT! premium, ACT! standard does place a restriction on the number of users. Microsoft does have a restriction on the database size for MSSQL Express, I believe it is 2 gig.
Roy Laudenslager ACT! Certified Consultant Techbenders email@example.com
If you don't have multiple processors or more than 4GM RAM and are unlikely to need such a huge database, there is no reason to go to ST.
If I run several databases in the nnnMB range with a few dozen users, EX should be OK? How about if I want to access the ACT data from other applications, do I need the ST version for that? When I buy ST does it come with MS SQL Server Standard? Sorry to jump on the thread but I'm looking to upgrade our 2006 Premium users.