We investigate multiuser MIMO downlink Broadcast Channels (BC) under the impact of channel estimation error and imperfect channel state information analog feedback. A low-complexity Partial-User Analog Feedback (PU-AF) algorithm is proposed; and we show that multiuser MIMO BCs using PU-AF achieves full multiuser diversity and multiplexing gain; however the feedback overhead is reduced significantly. At low to moderate SNR region and under moderate uplink sum feedback rate constraint, PU-AF turns to be a promising technique in the standardization of next generation wireless systems.