Delivery was quick and the pens were cheap, but they look exactly the same to me as the original that came with the 3ds. I'm very happy with them as I read a load of reviews and no-one seems to like the one's they bought from other sellers.
You can buy the proper ones in asda, I found it very hard to find the proper nintendo one's on amazon.
Don't know why. In Asda you can get them 3 for a fiver. I paid for 2 for £3 including delivery, which is cheaper. Not sure why you would want 3, but then again my daughter has a habit of biting hers, hence the need to buy a replacement or 2.
All in all 5 stars.