I have just had an unpleasant experience dealing with one of LMA's consultants who also seems to be related to the founder. I have not been looking actively for a new opportunity but this guy kept chasing me aggressively to interview with one of his clients for a quant role. Anyway, in the end I had the interview and I thought it went pretty well but then the recruiter disappeared. He did not contact me to provide feed back or at least an update and he did not respond to emails and phone calls. This is the first time recently I come across this type of behaviour by recruiters because ordinarily they update you on the progress even if your application has been rejected.

I have been looking for a site with reviews on recruiters where you can also provide your own review but it does not seem to be anything out there.

As far as I can tell, you just have been lucky all that time before. 

I have ~30 positions in the pipeline at the moment, with more than a dozen agencies. Most of them would disappear for weeks without feedback, updates, or even acknowledgment of emails: one day, they're enthusiastic, and then they're gone. 

I even have one agency, where the same agent is eager to follow up on the positions moving on and completely blanking me out on the others. Never thought it's possible, but here you are: for the positions that are easy to move with, I've an interview in couple days; for the rest of those, I cannot even get a confirmation that the end client is silent so far, literally silence. 

So I would follow up in a week and then move on: the recruiters earn their bread by getting people to interview. As many, they prefer not to deal with non-standard cases, and chicken away as soon as there's something unusual. I wouldn't waste time on the review site, as it mostly depends on a particular agent, and they tend to move around and out of the industry every other year.