Replying to All about skins!

Hi, im a newbie when it comes to skins...so ihave a few questions..

Do skins have to cover the width of the tips and tails, or is it enough if it covers just the middle section??

Any reviews of skins you have had? good experiences, bad? with what brands?

I just wanna buy some skins and I have no idea where to start...

gracias!