If you are happy with the end results as a consumer, that's what counts.

I would argue that with a talented artist and a slightly higher budget, you would of gotten a better result.

The real pain point (in my opinion) , is finding the right designer/artist that you can work with on a constant basis, that search alone makes websites like 99designs an optimal choice.

EDIT: 99Designs seems to have changed their model since my last visit. Definitely more sustainable for all parties.