I love my BOA laces - I have not used anything else since Korkers started making them available. Here is what I have learned though:
1. Make up a repair kit with a pair of extra laces, one winder kit, and a small pair of diagonal cutters. Carry it with you whenever you will be far enough from your vehicle that you don't want to retrace your steps. BOAs always fail after a 2 mile hike, not after a 100 yard walk.
2. BOA will provide replacement laces, and the winder system for free. Make sure that you have those parts on hand before you need them. When I get new boots, I take off the laces and measure them so I know what length I need. The laces are easier to remove when they have not been tightly wound, as is the case with well worn boots.
3. Inspect the laces periodically. Make sure that there are no frayed spots. If frayed spots get into the winding mechanism they can make it very difficult to remove the boot because the tongue won't open. If the frayed places are further down the boot, the weak spot will probably turn into a broken lace when you are two miles from the vehicle.
4. If you have very narrow feet, it is likely that when you cinch the laces tight you will coil enough wire onto the spool to overfill it. Overfilling scars the inside of the mechanism, making it very difficult to pop the button out at the end of the day. A solution is to carry a very small flat bladed screw driver and use that to gently pry the knob out. Overfilling can be avoided by simply shortening the wire by about 10cm. The laces come in 10cm increments, so I just order the next shorter length, ie, my boots take 140cm laces, so I order 130cm laces.
5. Make sure you pull your gravel guards over the winding mechanism! That will make a big difference in keeping very fine sand out of the mechanism.
Hope this helps. It sounds like the BOA system is nothing but trouble, but it is no problem at all with a bit of preventive maintenance.
I can't understand why some folks think a drink can is harder to carry out when it is empty than it was to carry in when it was full.