Makeup is a bit limited with my new baby, but I have used some of them. I have no MAC brushes, so I can't compare these to those. Maybe one day...
The powder brush worked fine and I didn't find it to be at all scratchy, but I prefer a powder brush with a larger head, so I don't use it much. The blush brush works fine and I use it somewhat regularly, because I like having a brush for each of my powder blushes (all 4 of them LOL). I don't use it with my highly pigmented blush though, because I think it would deposit too much color. I haven't figured out what to use the flat-top brush with yet. I think the fan brush might work for highlighters :?: , but I haven't used it brush myself yet.
The spoolie gets regular use, as does the comb/brush. No issues with either one. The sponge-tip is great if you prefer long-handled brushes for everything. I'm glad it's there, because it is useful but it's not the sort of "brush" I'd be willing to shell out lots of cash for. The white flatliner is quite workable if you prefer the horizontal edge, but I prefer an angled version of this one. I'm bad with eyeshadow, but I use the larger fluffy eyeshadow brush to lay on a soft wash of color, and it does a good job at that. That's probably not what it's actually for though.
I don't have the angled one that your set appears to have. I have a much smaller version of the regular fluffy headed one. I have no idea what it would be good for, as it's very small.
I don't do lipstick, so I haven't used those brushes at all.
I may have missed some, there, but for $4 (or less than $4), I think it was worth it.
eta: The first time I washed them, the larger brushes shed. The flat top brush shed insane amounts of hair. However, there weren't any weird smells or dyes leaking out from the hairs.
