They worked for me. I took benzos for ages and they worked fine. They caused plenty of their own problems but they also greatly reduced the anxiety. When I needed to get off them I used Lexapro - that worked too, but very differently.
I take meds for bipolar disorder again now. They work too - they reign the mania in and calm me slightly. My problem with them is that I stop them because I often don't think I need them or that they aren't doing anything. (a common problem with bipolar people apparently) They work though.