One of my students will be taking the SIELE exam next year. We did quite a lot of research to find out what official exam would suit her needs best. We considered the traditional DELE exams, but we decided to go for SIELE for a number of reasons. You can see my Facebook post "SIELE o DELE, esa es la cuestión" for more details.
For the last few weeks I will be taking the SIELE training course for instructors to learn more about the exam and how to prepare my students.