First is the concealer palette. 3 colors and a setting powder for $9.99 is awesome. If you have hardcore dark circle under you eyes like me then you need at least 2 colors to fully conceal them. One to neutralize the darkness and one to conceal. I use the salmon color for neutralizing and the lightest one to conceal, then I set it with the powder and I'm good to go.
Any/all of the brushes. I haven't used every one of them, but I have quite a few that I use daily and I would say they are very comparable to more expensive counterparts especially for what you pay. I use some of mine more than the ones I paid a lot more money for as a matter of fact!
Target is where I find Sonia Kashuk cosmetics, so if you have one nearby, I suggest you try these for yourself!