I have had ups and downs.
1. Little weasel recruiter tried to get me to take a help desk job for $14 an hour 1 hour from home. I went the interview anyway and was polite but not enthusiastic enough so they passed on me which was no big deal, I understand a tier1 helpdesk job isn't best for an INTP (and was 20 so I wasn't used to being psuedo-extrovert yet). But then, the recruiter called an instructor at my college and complained. This ruined my chances of ever getting a referral from college for something that was none of his business.
2. This sleezy, designer outfit, slicked back hair pretentious douche told me all kinds of lies to get me to take this job at a local web-hosting company that was absolute garbage. I turned down a great job as a sys admin at a financial firm to take that job. His sales tactics reminded me of Leanardo DeCaprio when he made that penny stock sale on the Wolf of Wallstreet. I was still young at this point and inexperienced with that type of douche. I was one of many who got scammed into this job, but had some great comrades and we all quit at the same time window for better jobs like a big exodus.
3. I had a good experience 7 months later. A recruiter helped me to negotiate from an offer of 32/hr no-benefits 6 month contract job, to 42/hr full-benefits and vacation 12 month contract. I worked that job for a year and then got hired on full time at a megacorp and have no plans of leaving this job. I actually had an offer again from that financial firm for another sys admin position so I had to back out on them and screw them over so they probably hate me, lol.
I would recommend trying to use female recruiters if you can. You can usually play on their emotions a little bit better and negotiate better. The one in number 3 was a female, and I have had other better experiences with female recruiters as well, while 100% of male recruiters have been sleezy car saleman types. Most of the women are 9/10s or better which is also probably part of the reason they can get these offers, but that particular one was not.