I like that they have many different types of physicians available for any need you may encounter in your facility or hospital setting! They are very flexible with scheduling as well - which is great when there's an emergency situation at work/home etc where it can be difficult to schedule someone right away (especially if we're not familiar w them).
The only thing i dislike about interim providers is their billing procedures; however this could just depend upon who handles our account & how long one person works within such roles before moving up into another department / role. We use interims primarily because my husband needs some time off from his full-time job during maternity leave so he doesn't lose out financially while still being able to provide child care support.