YES - the upgrade to Windows 7 is quite definitely worth it - and the upgrade installation is quite easy, as far as major upgrades go.
Windows 7 improves on a LOT of system functions, while using roughly half the system resources of Vista - so the improvements in both speed and smoothness of operation are immediate and noticeable.
Another writer complained about two items that were 'unbundled' from Windows 7, which are easily addressed:
#1 - If you're accustomed to using Outlook as your e-mail program, it is no longer bundled with Windows 7, but it is downloadable (for free) from Microsoft.
#2 - Password memory/storage (which I don't recall Windows EVER offering, but they complained about the lack of it in Windows 7) - IS offered within Norton 360 - a comprehensive security suite, which I use and highly recommend.
Take note, especially if you have more than one computer to upgrade, of the available multi-license offers. The Windows 7 Home Premium upgrade for One computer is about $120 - but it is also available in a 'Family Pack' covering 3 computers, for $150 (often on sale for $120 or so).
The Norton 360 package incorporates Identity Safe (the Password handler), Antivirus, Antispyware, Firewall, and several useful System Maintenance Utilities. It lists at $70, and covers up to 3 computers for 1 year (renewable online).
If you deal with the office supply chain Staples, and are a member of their Staples Rewards program (which is free), you can buy the Norton 360 pack for $39.95 anytime, with your rewards card. (That ongoing offer is also useful for saving money on the annual license renewals - you can enter the key code from a fresh retail pack, in lieu of paying list price online to renew). Staples also usually has a sale of some type on the Windows 7 upgrade packs, at least one week out of the month.