mSATA Drives - How do I do one of these?

[Red Machine D]

I'm buying a new mSATA drive (most likely this) and I've got a couple questions.

Would it be better just to install my OS and my browser on the SSD, or is it better to use it more sparingly?

I know SSD tech has gotten a lot better since the first ones came out, but just how long will this thing last?

What other kind of applications are better used for an SSD over a HDD?