Hi Meleftie! The first time I used Kiss and Blush on my cheeks, it looked quite splotchy (I used my fingers to apply; I'm typically used to powder blushes so am not as adept with finger application). However, once I used a stippling brush, I found that the product applied really well and blended into the skin naturally, so that's how I apply my Kiss and Blushes on the cheeks now
. I actually just posted a review of the K&Bs (and mentioned my application method in depth) on my blog today, if you find it helpful: https://www.themakeupwriteup.com/ysl-kiss-and-blush-review/. Another thing I've found helpful with the K&Bs (if it looks splotchy or uneven) is to exfoliate the skin if needed before application. Hope you will enjoy your K&B, and hope this helps somewhat!!
Edited to say: Sorry, missed the post where you tried Medgal07's technique! I'm glad it worked for you!