Hi - I have just replaced the Toshiba 1.8inch HDD on my Vaio VGN-TT11WN with a Kingston 256GB 1.8 SSD (costly!) and it fitted perfectly and has worked perfectly, with the system restored to it OK. During the restore process it even gave me an option "did I want to restore to the original size (160GB) or use the whole of the new drive"
The computer now boots up about 5 times faster than before. Someone advised me that an SSD may not last as long as expected unless page file swap is disabled and disk indexing disabled. I am not sure about how important this is though. I wonder if someone can confirm this? I have added 2GB in the spare slot to try to minimise page file swapping in the meantime.