I have a 124G. It's often considered the gateway TLR, and I can attest to that. I've now owned a Rolleicord Vb, 'flex 3.5E and 3.5E2, 'flex 2.8E, and Mamiya C220 (still own them all except the Vb and 3.5E2). While the Yashinon taking lens is no slouch, I find myself reaching for the 'cords more often. The 124G comes out to play when I'm not as comfortable taking the 'flexes out. The biggest pro, IMO, is the ergonomics. Very similar to most Rolleiflexes, which I find very comfortable.