I can say for sure that the macarons recipe has been many times tested in my kitchen. This is only because I am so critical and perfectionist. I had successful tries, but also several fails which I couldn't explain. So I had to keep testing the recipe to find out the formula for the perfect macarons. And for a whole year all my family, relatives and friends tasted macarons which were beatiful, but also cracked, exploded, too moist etc.
I have to warn you from the start that you need an electric oven which will allow you to set the temperature between 120-150 degrees. Otherwise it will be more like of a gamble. At first, I couldn't set the oven temperature with precision, so some times macarons were pretty good but other times they were completely ruined. After all the stars aligned and I had to change the old oven with a better one, I started testing the macarons recipe again. Guess what: they are perfect, 9 times out of 10!
Anyway, for the macarons recipe you need utmost accuracy, for measuring the ingredients, for the preparation and baking time. So if I insisted on some details it's because they will make a difference, even if they don't seem like.
I've tried to explain the process as clear as I could (without any other confusing details) and to show you what tools and ingredients you must have. If you still have questions, don't hesitate to write them in the comments.