You get two things with the AMBEO - each worth at least $300 USD (IMHO): A very decent IEM, and a really good binaural recording system (using your Apple i-device) with microphones that capture hi-fi sound. This review has only a few sentences about the binaural recording - the bulk of the review concerns the IEM/earphones.
http://www.hifiheadphones.co.uk/community/threads/sennheiser-apogee-ambeo-iem-earphone-binaural-recording-rig.4519/