I had my NT at Good Sam. The facility is brand new. The US rooms are huge and there is a flat screen on the wall so you can see everything very clearly We met with a genetic counselor before the appt for a few minutes just so we understood the results. Finger prick for blood and got the results in about a week.
Baby was not cooperating so I had to go back for 3 tries to get the scan. Never had an issue getting an appt even at the last second!
I went in to have my NT at Good Sam. Found out I was too far along (a week and a half further along than I thought). The techs there are great though and they really try to work with your schedule.