New in SP-2: Built-in 128-bit encryption support (by default) for all encryption-based services (Kerberos, Encrypting File System, RAS, RPC, SSL/TLS, CryptoAPI, Terminal Services RDP, and IPSec); Several hundred bug fixes for the following areas: setup, application compatibility, operating system reliability, and security; Release Notes Upgrade Meter: 4
New in SP-1: Several hundred bug fixes for the following areas: setup, application compatibility, operating system reliability, and security
Upgrade Meter: 2
Pros: A helpful collection of bug fixes for users of Windows 2000
Cons: Not necessarily must-have upgrades for all users