I spoke to alexandra on twitter before booking my first duo. She informed me she had not done any duos with the other girl (Crystal), but it was the only one on schedule. She talked to her before the session, so even before heading in I knew it would be a watered down session. I booked, not a great session. My next 2 duos, which was with Alex and Rachel (her recommended duo partner) was absolutely fantastic.
I believe Alex is leaving the industry in May, for anyone interested