These are honestly a fantastic buy for the price. There are a large selection of soft, reasonably well made brushes that are nicely presented and stored in their case. There are a couple of empty slots in the storage roll for brushes that you may already own which is handy.
The only improvement I would make is the inclusion of a Kabuki brush (even a mini one), otherwise you have pretty much everything you need here. I would say that for synthetic bristle the quality is excellent and easily the equivalent of those sold by the mid range beauty stores.