Yeah, it should be fine; the thin line is characteristic of a more inexpensive humidor. I'm not quite sure about how that affects functionality, however. I would imagine that it may, to a degree, but at this stage, you'd never know it. A full spanish cedar humidor could prove costly, however.

For about the first 4 months of my cigar smoking experience, I used tupperware with a small, damp sponge. I think you'll be okay.