Over the years, I have tried so many corkscrews that I didn't think I'd ever find something simple that worked really well and didn't have big rabbit ears or a tendency to break the cork. Then, two weekends ago, I used one of these "automatic" corkscrews at a friend's house and loved it. With a slim, unbreakable design, the screw goes straight down into the cork and then comes right back up with the cork as you keep turning the shaft. It makes SO much sense.
This one is MONOPOL's expensive version with "Double-spindle-engineering, superfine polished, satin-finished", and you should check out this one which is $20 cheaper.