I basically started this to be a time saver. My wife works 0700-1700 and I work 0730-1630, but I go to the gym before work. We go to bed around 2030, so if we cook dinner when we get home it's basically the rest of the night (the kids help but can't do anything remotely complicated in the kitchen). This way, we have a LOT of meat cooked. The boys can pull something out of the freezer during the day, warm it up and make some vegetables, and a delicious dinner is done when we get home. After dinner, I can go to the wood shop and she can make soap in the basement (her side-business). This makes everything much easier for everyone and I cooked everything for the month in a few hours.
I love my grill, too, but if you see the difference in a medium rare steak in the sous vide cooker and the grill, you might be converted.