The team at Stantl had been fantastic with our recruiting needs over several years now - we've used them for almost every role in all of my companies! They were always timely & accurate about their estimates as well (which was important given how fast things change!).
We didn't have any dislikes but would welcome having some more details from candidates regarding what they value most when hiring decisions are made so it's easier (";)to understand why someone has left one job or another if you're not able/willing ot go through HR records etc..