I have the aluminum/metal boxes, the plastic/foam insert boxes, individual compartment box type, all work just fine. Sure the hackle gets a little matted at times. I guess it matters, but not really sure. Seems to me the more some of my flies get beat to slop and look like cripples they catch more fish. A lot of times when a hatch is real heavy and fish are really keying in on the actual bugs. I'll get my nippers out and hack the fly of the day up just enough to have it look the same but different. Sometimes It's not what's pretty to us that catches the fish. Sometimes those pretty ones are better left on a picture presentation in the office for people to ohhh and ahhh over. I like a good look'n bug on the top of the water as much as anybody but, just not sure it makes all that much difference. Far as keep'n um pretty. The individual box compartments are one of the best for keep'n um look'n store bought or homemade and never used.