EFM health clubs?

I got a 'junk mail' flyer, advertising EFM health clubs a few days ago. I'm trying to get a bit fitter and lost some weight. I've never heard of them before, but seeing as one club is only a few minutes away, I thought I might give them a go. They are advertising a "5 weeks for $25" introductory offer. Has anyone ever used EFM? Got any good experiences to share? Bad experiences? What are the facilities etc like?