Is "interesting" a negative or positive phrase?

When someone tells you something like:

It's interesting to have such a feature.

It's interesting to look.

Is it a negative or positive phrase?

It sounds like a positive phrase but I think it may be a negative phrase because if we wanted to express a positive phrase then we wouldn't use "interesting". We would use a more appropriate phrase like "it's good", "it's nice", etc.

"Interesting" could be either positive or negative. If someone says your artwork is "interesting" and she really means it, that is positive. But if she says your artwork is "interesting" because she cannot think of anything positive to say about it, that is not so positive.