I've been too-ing and fro-ing in my mind about whether I should do it. The main issue for me is the conditions around the "personal genome service". Under the special offer, you have to pay a subscription of $5/month for a year. This subscription gets you access to any updates, and emails about new matches for a year.
Did you sign up? Did you read the fine print?
Here's the thing... if you cancel the subscription you not only miss out on emails regarding new matches, you also cannot seek out new matches yourself, and other people signing up later won't see you. I emailed 23andMe to check my interpretation and got this reply:
"If you cancel your subscription after the one year commitment, you will not show up in new relatives Relative Finder list nor will you see them in yours."All credit to them for a quick and unambiguous reply, but the fact remains, no matter how big 23andMe say the database is, you don't necessarily have access to that many other people nor they to you.
I would be much more comfortable with a model similar to most genealogy sites where you could see other matches but only initiate contact if you had a current subscription.
However - and this is where I'm underinformed and would appreciate input from someone knowledgeable - it seems you can download your raw data and presumably use it elsewhere. From what I can see that's pretty straightforward so far as the male line is concerned and if I thought I could convince my Dad to give me a vial of spit for Christmas then I think I could live with that. But, if it's me that does the test is there anywhere that I could use mitochondrial and more particularly the "relative finder" results?