I know 2 people (very close friends) who do\have worked in recruitement. It is very competitive, long hours, no flexibility and everything is about the money. Its a bit like the idea of the stock exchange where everyone is climbing all over each other to make more money than anyone else. As the bulk of your income is determined by commission you will feel constantly under pressure to meet ever increasing targets.
You won't learn new skills over time, there isn't much of a career path and its a very repetitive job, always making and taking the same phone calls etc etc.
I would be careful about going into it. In fact its a bit like a pyramid scheme where part of your commission goes to your direct manager and it all feeds up to the top where the owners mint it.