I did both Ancestry and the 23andme kits. Both of these are in the US as far as I know, so that may be the reason for the steep postage. The reason I did two was because the results of the first 23andme surprised me so much. When the result of the Ancestry one came through, again surprises but similiar results. Since then I done a little research on how the whole DNA business works. I am a little wiser, but on the whole a lot more confused. This is basically what I understand: the results from these tests will be different if you are male or female. Everyone gets 50% DNA from your mother 'mitochondrial 'and then HER mothers line, then her mother, etc. then 50% from your father 'Y' DNA..then if you are female you only get his DNA through HIS mother's female line. Males get the Y chromosome from their father, then his father, etc. and then their 50% from their mother's, mother, mother's etc. Some people take it very seriously and get their relatives to do the test then compare, so as to get a clearer, more in depth idea of their origins. The 23andme one says it goes back to ancestors about 500 years ago. I have done my known documented family history back to 1600s, but results say I have a French/German ancestor in 1800s. I can't understand that as my paper trail doesn't show that, but there are a couple of gaps, so who knows. The Ancestry one states I have 17% Scandanavian DNA, but this test goes back further; 1000s of years. It compares your DNA to groups from various group regions around the world and thereby gives indication where your ancestors were from. I have lots of Western Europe, as well as British, Irish, Scandanavian etc., but as these result reportedly go back 1000 years say, thinking of the British Isles history, viking, Norman invaders, etc., It did show that my ancestry line in England was southern England. On first reading the results I really thought it must be wrong, then when I looked and found a shared DNA relative (someone else in the family had down the test) and saw that it was a 2nd cousin, and saw shared DNA with names of people I didn't know, but know from paper results are 4th or 5th cousins, so I was relieved to discover it's not fake as such. It's not in depth, more a general insight into origins and I think most people would be surprised learn how we are made up from all sorts of places. I think it would make a fun gift, but be aware, on the 23andme forums many people have found that they are not the result of the parents they thought they were.
Also, some nice stories of people making connections to family they were trying to find.