The main advantage of SSD is lower power consumption, but this is not a big practical impact since other components in the notebook consume most of the power, and reliability, since flash memory deteriorates gradually and the controller detects and avoids using the failing bits, an SSD is not likely to fail suddenly and all at once like a HDD might. Well, unless it is defective.
With the technology that detects g-forces and parks the HDD head when high vibration or a fall is detected, I don't think shock resistance is a big issue for HDDs. Apple uses this:
Sudden Motion Sensor - Wikipedia, the free encyclopedia
SSD is also faster at retrieving data when you are pulling a bit here and a bit there, while if you are reading a contiguous area (e.g. a single file) there isn't a real practical advantage. This data retrieval speed is an advantage in super high-performance enterprise data storage for limited applications.
A SSD is always ready to deliver data, unlike a HDD which has to spin up if its been idled or if the computer is being booted up. So if the O/S or certain applications are stored on SSD the computer can launch faster. But this potential hasn't really been exploited in Macs or PCs yet.
The basic disadvantage of SSD is cost and capacity. Flash memory is still a lot more expensive, per bit, than hard drives. And that cost is extremely volatile - NAND flash price is a rollercoaster.
Finally, flash memory can fit in a small space, but in notebooks they reserve room for the HDD alternative anyway so there is no space advantage.
I'd get for an SSD in a notebook if someone else was paying and it was a corporate notebook, but not if spending my own $ or if I was going to use the notebook for personal/consumer type stuff. All the files I'll produce in a decade of work are fewer GB than a single ripped DVD.