How useless is a mini-wine cellar, really?

Robin, while no one who posts here would buy a mini-wine cellar, I'm for almost anything that opens up the world of wine to someone.

Ok I need some help here.
I am looking to buy a wine cooler. I gues what is suggested that you buy a big one. Got it

However...(comma space)

How do I know that my wines need to be kept cool?

Simple answer - all of them. I know of no wine that can be hurt by being stored at 55 or 60 degrees. On the other hand, all wines can be hurt by being kept too warm.