Hello - Just checked on Mumsnet to see if anyone had heard of the Harmony test as I just had mine done at the FMC as well. I'm an older 2nd time mother (38) and paranoid about Down's risk so was considering a CVS if my nuchal fold test at 12 weeks made me nervous in any way.
The FMC offered me (rather cryptically at the time) "a blood test" at 10 weeks but when I got there explained more fully and gave me the name of the test (if you google Harmony Testing you'll get all the information - seems like it is now common in the States.)
My results came back two days ago with a 0.01% chance of the three trisomys (apparently the test is 99% accurate) which is a huge uplift and I've cancelled my CVS (I'd booked it as soon as I knew I was pregnant because I wanted Professor Nicolaides to do it, if anyone was going to.). I'm going to my 12 week scan next week at the FMC (like RTchoke I paid £180 for the scan and the Harmony blood tests were offered free).
I would recommend the FMC to anyone - I used them last time and the level of care and attention given during the scans, coupled with the fact that you get the results the same day, is just incredible. The staff are fantastic, the centre a touch of luxe (! after the NHS for everything else!) and most importantly you know you are in the best hands. I think if you are fortunate enough to be in London and are being seen on the NHS at King's you get the same team, led by Professor Nicholaides.
While not diagnostic, unlike CVS and amniocentisis, the 99% accuracy (sometimes given as 99.9% accuracy depending what you read) is a pretty amazing scanning tool.
I think Professor Nicolaides is campaigning to get the NHS to pick up the Harmony test nationwide. He also spearheaded the nuchal fold test (which I think I'm right in saying he developed) being rolled out across the country.
Love to know how you get on peiw and RTchoke. Best of luck.