Yes it is worth it I currently have a 60GB SSD I upgraded from a WD Black 1tb and I noticed a huge difference, best upgrade I have done in a long time.
But it is constantly full. A install of windows 7 and fully updated is about 30 to 40GB
Most my programs I install to a second HDD but smaller apps I put onto my SSD and it preforms well.
You will only get windows 7 and a few programs on it. Game installs are about 8GB each some 15GB, But you could set it up like I have Main C drive is SSD thn a 1TB HDD for all my games and large programs like VM ware, office, Games and CS4... so on.