It's quite fun, keeps popping up on my Facebook page. You pick tarot-style cards and then it gives you some scent recommendations at the end, and you can chose two to sample for free excluding postage.
www.penhaligons.com/uk/en/fragrance-profiling
I'm not that keen on the first two I tried, so just had another go, selecting unisex instead of female. The choices they gave me do have a lot of the notes I like in a scent, so I'm trying another couple.
It's quite fun and just nice to get a little treat in the post.