I'm interested in getting the "All In One" system but I see there are several different length configurations. Do any of you have a preferred length and why? Did any of you buy a certain length and the wish you had longer huggers or slings? I just don't want to buy a set and then realize I should have gone with the 8' slings rather than the 6' slings or I find out the 8' huggers are overkill. Thanks!