Solid State Drive - Worth it?

[lamps]

Are these worth the money? Thinking of getting a 30gb one, would that be enough for vista? Possibly some games if theres room

http://www.overclockers.co.uk/showproduct.php?prodid=HD-009-OC&groupid=701&catid=14&subcat=910

 

[lamps]

Dont currently have vista, planning on buying a new system, and was thinking of getting a solid state drive with it (if its worth it)