I did a CertHE there. Lecturers were great, really supportive and engaged with teaching and learning in my area. However admin was atrocious - I didn't get my qualification awarded until nearly 18 months after I finished the course, and only because I went there every week for 3 months (sometimes twice a week) to chase up continually. Also had issues on the course with them taking nearly 3 months to reimburse me some fees I paid that were than paid by SFE (while I was out of pocket the whole time...).
I have a pretty high threshold for what I consider "bad" uni admin, as I've worked in a uni before and studied at several and am aware a lot of what new students think is "bad" admin is just the standard for the sector, but SOAS really was by far and away an outlier. Which was a shame since I had such a fantastic experience studying there with the academics really standing out to me in the quality of teaching and support compared to other unis I've been at.
That said for most students you probably won't need to deal with the admin much so won't be affected by that. If you do end up having to get them to do anything (which is usually something stressful and/or urgent) it becomes quite painful though. I wouldn't say to let that stop you from applying there but it is worth preparing yourself for mentally if you do go there!