I am considering buying an SSD for a old laptop. We still use the laptop. it works fine as a web browsing machine.
I also want to use it for navigating in my motor home. I think having a mechanical drive in a laptop being used in a moving vehicle may kill the HDD prematurely. Hence the SSD idea.
However the laptop has only a SATA 1 interface. Read s-l-o-w. Maybe it is not worth spending $100 on a SSD for this laptop. A quick search on the forums shows people saying that in spite of this bottleneck they still see a huge performance increase.