I used to live there, and would love to go back for a holiday at some point.
One of the interesting things to note is that while it is generally warmer and drier than the UK (Port Stanley is around the same latitude south as London is north, but is partially sheltered by Andes, which strip a lot of the moisture out of the air) the water is much colder, as it comes up from the Antarctic Peninsula.
We used to spend Christmas on Pebble Island, in West Falkland, and we would have a big barbecue on the beach and spend the day sunbathing. We would only ever go in the sea for 30 seconds at a time, though, and would come out blue and shivering.
Cost of many foods can be expensive, although beef, pork, lamb, goose etc can be very cheap as they are abundant.
Transport can vary a lot depending on where you intend to go. Although there are some roads outside Port Stanley, many settlements are accessible only via air, sea or trails across peat bogs.