The measurement device independent (MDI) Quantum Key Distribution (QKD) is a practically implementable method for transmitting secret keys between distant partners performing quantum communication. SARG04 (Scarani-Acín-Ribordy-Gisin 2004) is a protocol tailored to struggle against photon number splitting (PNS) attacks by eavesdroppers. Considering its decoy implemented MDI-QKD version, we analyse its performance from secret key bitrate versus communication distance point of view. Among several factors such as error correction function, dark counting rate (DCR) and quantum efficiency, considered for achieving the largest key bitrate versus longest communication distance, we infer that the most promising for MDI-QKD SARG04 protocol is the DCR representing a challenge to optical material scientists.