I have one which was only sold in UK to my knowledge but there a number of US circulator brands, where you provide the container and they heat/circulate the water. Anova and Joule are the main ones I think
Chicken takes 60 minutes - I literally sprinkle some rub on them and that's it. Reheating is either putting them back in the water for 15 minutes or eating cold.
Lately I've been buying frozen chicken because you can cook it sous vide from frozen, you just add on another 15 minutes or so. I can get 750g chicken for £3, or 800g unfrozen for £6. You can't tell them apart, and yes the difference is massive between SV and oven.
I've had it 2 years and I cook ALL my meat in there, except when I grill (bought a kamado joe in January and that hardly gets used lol
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I can make several days worth of chicken/meat in advance, the most effort is bagging individual breasts up and then dunking the bags in iced water to cool down for the refridgerator.
I also cook other meats in there - you can cook all red meats eg beef, lamb etc at the same temp, the only difference is the duration. So I might put a small brisket joint in there at 130c for 48 hours, some boneless lamb legs that are 8% fat only take 12-18, throw in some burgers or steaks in there too as they only take an hour.
Sous vide produces results that transform the meat - when you put some lamb on a fork your brain thinks it knows what to expect but when it lands on your tongue it takes you by surprise because you've never had lamb cooked that precisely before or that tenderly.
Same with salmon, blows my mind every time, it's like fishy butter is the only way I can describe it
I am methodical in my meal prep but also lazy. I'm sure someone prepared to invest a little more time could come up with even better results. eg last week I tried batch cooking the chicken in the SV, then cooking some stir fry veg in a pan with curry paste and coconut milk then adding the chicken to it to make chicken curry. It was incredible because the chicken was so tender but I'm lazy so back to just SV chicken and rub