"Sometimes, a service pack comes along that really makes a big difference. Take NT. Before SP3, it was garbage; afterwards Microsoft had its first server operating system that was worth anything. XP before SP2 was so-so, but after SP2, it became Microsoft's best desktop operating system ever (sorry, Vista). And, now, with its SP1 for SLED (SUSE Linux Enterprise Desktop), Novell has given an already excellent business desktop a real kick in the pants."