Has anyone lost weight with 'cheat days'?

lost 25 pounds ! cheat every weekend.

Yes.

I have pizza and breadsticks with my sister every Friday night . I used to use all of Friday as my "cheat" day, but I try to stick with my Friday night cheat MEAL.I eat pretty light the rest of the day on Friday (Greek yogurt for breakfast, progresso soup for lunch, no afternoon snack) . I am still losing. In fact, I have done this since I started and I have lost every week. I find that looking forward to my weekly splurge makes it easier for me to stick to healthy eating the rest of the week. If I want something greasy on Thursday, I say "No. you get a treat tomorrow."

I don't believe in cheat days. But I also don't believe in denial of foods. I set a healthy deficit, refuse to go down to 1200, and eat within my calorie goals for the day. If I go over a bit, I either eat less the next day or workout a bit more. I make my food work for me -- it's fuel for my body, so I give it plenty, and if I'm craving a chocolate bar, I have one. If I want pizza, I have it. I just make it fit my calories and macros. For me, this is way more long-term sustainable than trying to figure out 'cheat days' which often turn into bigger binges than planned because the mentality becomes "I can do WHATEVER today!"

The way I approach cheat days is similar to my approach to counting calories: I earn them with exercise.

Think of it as a game: Every morning you are given a set of calories to spend on food. You only have so many calories, and you have to be sure to spend them wisely so that you'll get everything you need for the day. You need to make sure you invest in things like protein, omega 3s, etc.

Let's say you don't feel like you have enough calories to spend on all of the things you want to eat. That's where exercise comes in.

With every minute of exercise (cardiovascular exercise specifically) you earn that many more calories that you can spend. Now you can't just spend those extra calories on anything, as your body will need extra nutrients to compensate for the exercise, but you get where I'm going with this.

On average, I burn a minimum of 500 calories per workout. (Usually more). I may use those extra calories or I may not. I may just eat the same amount I was going to eat that day and leave it at that. If I do, then my excess fat burns those calories.

Over the period of a week, assuming I stay true to my goals, that tends to leave me with at least one days worth of calories that I've burned. Assuming I plan my cheat days well, I don't make too much of a dent in that "reserve" of calories that I've burned, and I have a successful week.

Every now and then, I do have a week that might not be as successful as I like, but that's why it's so important to stay with what I'm doing. If I maintain the rest of the time, then a cheat day or even a cheat weekend won't hobble me too much.

I try to avoid it, since it throws my low carb diet out of the window, and I have to go through the adjustment period, also I feel ill on a"regular" diets. I get awful acid reflux and tend to throw up after meals a lot.

On Keto I don't get any health problems, so for my health not just my weight it is important. Though I do, at least once or twice a month go out for birthdays or whatever other things come up.

Ok, based on your info, and about 4 days of exercise.....
Your TDEE is ~2150 - 2180 / day
So if weight loss is the goal, and you are doing -20%, your intake would be about 1700 - 1740

So if you were to do 1700 7 days / week == 11,900 calories
So if you are doing 1200 / 6 days == 7200 calories
You technically still have about 4700 calories you can play with to still be in deficit of 20% for the week....

Something to consider....
Me personally, I would not pound down 4700 calories in one day if I were losing weight....

I would opt to bring up my daily caloric intake to maybe 1500 or something, and fit my desired foods into those calories...

I cheat once a week every sunday. I do it mostly because it crushes my cravings that week so whatever I'm really craving I eat. It also shocks your body, allowing you to continue losing weight.

I typically eat 1200 calories each day and then one or two days i will have 1800. That extra 600 could be whatever you want and it feels like a lot more when the other days are so restricted. Cheat days are good as long as its not a binge everything in sight kind of day. I still monitor my cheat days I just dont worry as much!