I have tried the S4, crooked horn, Allen, FHF & Agc so far. The FHF is nice but I’ve gone with the Big AGC and it carries tags, knife, Leica rangefinder, wind checker, extra ammo, lens cleaner, pen & zip tie so it is all I need if I shoot something and can drop my pack if I’m in a huge hurry running to the top of the ridge or just taking a short scout with a rifle it has everything to be legal as well.