I used to have a Yashicamat EM which is a pretty similar but slightly older model (60s as opposed to 70s) to the 124 and it gave very good results. The build quality was acceptable, it was reliable and the lens was really rather good in terms of sharpness and contrast. I only disposed of it when I had a large camera clear-out to focus on using my Olympus gear and sometimes regret parting with it.