The Real Techniques powder brush is superb, it applies a fine dusting of powder perfectly with zero brush hair fallout and no cakey-ness. Hurrah!
It is dense enough to stipple powder in areas that need more coverage and is soft enough to sweep powder over the face gently.
I've been using the Mac 150 for a couple of years now, and frankly I've hated it as every time I used it, it applied more than powder- with a fallout of black brush hairs that I had to pick off or find later in the day. Aargh! I've no idea why I didn't change sooner!
The synthetic bristles of this brush deliver a smooth result, it's light and lovely to hold and I love that it is self standing.
This brush is definitely worth it, I got from Amazon as not sure if available in UAE yet... The mac 150 has hit the bin!