We converted from ArcServe to CommVault over the past several months, and are currently running Galaxy 4.1 SP2. It is definitely a superior product to CA ArcServe. We evaluated all of the major vendors in our engineering lab environment, (CA, Veritas, Legato, and CommVault). The other vendors' reps didn't seem to know how to setup their own products properly, and sent out different people each time, so they stepped all over themselves in making changes to their installs. CommVault sent out the same people each time, knew their products, learned our environment, and knew how to answer questions on the spot. Their service and support are much better than anything we saw from the others. We're now backing up 200+ NT/2000 servers with Galaxy, including SQL7, SQL2000, Exchange2000, etc., in addition to some Solaris systems. Their mailbox level backups for Exchange are awesome, and make restores of mail items, calendars, etc. a breeze compared to what we used to have to deal with.