I got this brush a few weeks ago in my Sigma Travel Kit so I thought I would share my thoughts on this brush. I wanted a stippling brush for a really long time. I hate using flat foundation brushes because they leave streaks and I don't think they blend the product in the best way. I also tried sponges but they suck up too much foundation, so to me this was the last viable option for a perfect foundation application.
I use this brush every single day, my old ones have been thrown in a corner somewhere. You can use this brush for applying other products also such as cream blush or highlighter it has many uses.
I like to do my foundation straight after my moisturizer so that it blends in easier, I use 1 pump of my MAC foundation and I just dot the brush on my face and start stippling. I tried using this brush to swirl in the foundation but that just doesn't work for some reason. But by stippling this into my skin it really blends in leaving no streaks which is great. I also noticed that by using this brush you get a lighter coverage which you can build on. Obviously the bristles pick up less product than a regular foundation brush but I think that is good it gives a more natural airbrush look.
I really love this brush that's for sure and I would recommend it, you can see a big difference in your makeup if you use good brushes. I thought my foundation was the problem before using this brush. But after using this it just looks like I have great skin and it doesn't look like I'm wearing foundation. If I had to name a setback I would say that this brush does shed a bit, nothing too dramatic a few hairs here and there and the color can bleed a bit when I wash it so just have to be careful with that but for the price it is definitely worth it.