Meshmixer reports no errors, but sometimes a few can slip through on more complex models. Your model isn't all that complex and is probably good for manifold.

The barbed clips (4) on the face are unsupported in the design, which means the print service will use support material during the build. It will necessitate a bit of clean up, but it's minor. There will be bridging in the large oval hole and the rectangular holes as well, perhaps some droop, or internal support will be used, for a bit more clean up. If you're selecting the lower cost FFM/FDM printing, support is likely. If the service permits, select internal support option. If you're going expensive, with SLS, the media is the support and won't be an issue.

In general, I'd say it's a healthy model.