This paper presents an analysis of a commercial 802.11n MIMO 2×3 dual band (2.4 & 5 GHz) system focusing on the operational throughput performance over an indoor environment with Line of Sight and Non Line of Sight scenarios. Although many authors have provided evidence on the effectiveness of this technology in field strength distribution, throughput or propagation-simulation environments, efforts on all parameters combined is limited. This paper also intends to elucidate the comparison of these metrics by evaluating a MIMO 2×3 dual band (2.4 & 5 GHz) system, focusing on physical measurements of the operational performance, in comparison with simulations of the field strength distribution over an indoor environment.