Speed lacing uses pull-cords with a locking mechanism to tighten your boots quickly—just pull and lock, and you're ready to ride. It's a solid middle ground between traditional laces and BOA systems, offering faster entry/exit than laces but with more field-repairability than BOA dials, which can break on multi-day trips.
The main advantage of speed lace is simplicity. If a cord wears out or breaks, you can usually replace it yourself or even rig a temporary fix in the parking lot. BOA systems, while convenient, typically require a replacement dial that you need to carry with you. Speed lace also gives you moderate zonal control—most systems have separate pulls for the lower and upper zones so you can dial in different tension.
The downside? Speed lace can slip slightly over a long day, meaning you may need to re-tighten after a few runs. It's also not quite as fast or effortless as twisting a BOA dial. If you value reliability and easy repairs over maximum convenience, speed lace is a great choice—especially for riders who spend multiple days on the mountain without easy access to a shop.