[krn001]

You will get a variety of answers on this one. Some prefer them. Some not. Some use albums, some use top loaders. Its what ever you feel comfortable having your cards in (and make sure that they are not too tight otherwise they will ruin your cards).
As far as the chipping issue, that shouldnt happen unless you are constantly moving the card around in the case. If it is pretty much stationary for most its life, than you shouldnt have any issues.

I didn't try a magnetic until receiving one in a trade this year. I like them over the screw down, mainly for the ease of use. I'm not sure if they pop open if one gets dropped.