I decided to give them a try this year. At the start they where awkward to use but I got used to them quickly. I started using ham gear from summits last year so I can tell the difference. Hauling the equipment put a lot of strain to the knees especially on the downhill part. They make hiking much more comfortable especially when it goes uphill or downhill. I decided to get telescopic poles as they can be packed away more easily. I consider this as a big advantage on the parts where I have use both hands.
In conclusion I´d say they are worth using. Get them and get used to use them. It´s important to learn to use them properly.

BTW: With many people I see using them, I get the feeling that they are some kind of fashion item. On the bright side you do not stick out as much when you use them too.