The buillder I used to work for tried them for a few weeks. Got deluged with text messages about jobs he wasn't interested in then spent nearly £200 on "leads" but only got 1 small flagging job out of it.
Now I work for myself - woudn't touch them with a barge pole!
I get most of my work trough word of mouth but I have signed up with a website called FindAGoodOne It brings in a few jobs a month on average and it's free for the first year.
