This kit offers a range of specialist filters for 58mm lenses which can be used with adapter rings to work with smaller lenses as well. At the price of this product, the buyer gets a lot of product at an excellent price, which may well not be used that often.I have generally used Cokin filter kits in the past, as they provided the maximum flexibility with different size lenses. However, this offers something similar but much less fiddly than the square glass. The filters happily cascade (useful if you want a really strong neutral density filter) and the lens cap fits the filter without problem. This is really useful as I sometimes have problems with my Canons lens cap fitting filters. The lens cap also fits the lens hood but I have used that less often.The bag to store them in is good and I decided to put the filters straight into each pouch without an additional sleeve as they are well protected. The cloth is okay, but nothing special.My only reservation (and I've not marked it down for this review as it is a different option) is that I think you may be better with a bigger diameter than 58mm to support more lenses and then use adapter rings to get to that size.