When I got my Seamaster, I was very frustrated that a $1200 WATCH kept worse time than my QUARTZ timepiece. I found my new watch gained about 5-7 seconds/day, while my aging Seiko that I bought in 1979 was within a second/month. I even ordered a quartz Seamaster, but the idiot dealer who sold it to me never checked it and when I opened the box the thing was broken and not running. I did two things. First, I bought a few tools and learned to adjust the watch myself rather than learn which position to move it at night in order to partially cancel the time gained. It now runs like I believe a chronometer timepiece should and is almost zero on a weekly basis. The watch is capable of fantastic precision and I am very impressed with this capability. Secondly, I sent the quartz back and got a refund. My suggestion is that if you want a great looking watch that you do not have to fuss with and worry about how many seconds you are off and how to position it at night to compensate for the daily error, get the quartz and forget about it. If you do not care much if you are a minute or so off from week to week then get the mechanical watch and do nothing special but wear it. I do not have the "time" to fuss with this on a daily basis. I just want a watch to wear that looks great but keeps precise time and the SMP certainly does this NOW. Good luck.