There are some die hard fingerless mitten wearers out there but mostly people have mixed feelings about them.
Most people suggested that indeed a full mitten was more useful when it was cold. (I have to agree). Others suggested that they were a fashion accessory and would be best knit out of a light weight yarn instead of wool. There was some confussion around the name fingerless mitts. Mitts don't have fingers and if these are fingerless shouldn't they be called fingerless gloves? Others left comments about wearing them indoors at home or at the office. Now this I can relate to. If I had to pick one word to describe living in an old farm house "drafty" comes to mind.
Maybe having warm hands will improve my game!