For me, 2 conversions from 3.74 SQL to 4.45 SQL (one being for John Shaver's client) and 1 from 4.40 pvx to 4.50 SQL. I've found everyone's experience to be roughly the same which is no increase in performance (which it can't by it's design) but at the same time it's fairly reasonable. To ensure that, in all 3 cases the App Server and SQL Server were on the same box, the box was overloaded with many processors and RAM, and SQL Server was configured to use max 2/3 of the system RAM (otherwise it consumes almost all RAM and not enough may be left over for App Server). I think most important thing is to set client's expectation that it won't be as fast as their current MAS 200 but conducive to reporting and integration needs and that should be main consideration in purchasing decision.