I think your best bet is to find a device that fits your needs, right brand, color, and features. These companies don't make non-functional devices. A specific device may not work well in all situations. Something as simple as internal antennae orientation can change how a device works in one home vs another.
Locks, being battery powered, sleep a lot. When the hub issues a lock or unlock command, it can send that message out up to three times (not positive about three). If the lock is awake during the time the message is sent, the lock responds, locking or unlocking and acknowledging completion. If the hub doesn't get an acknowledgment from the device, it moves on. The reason a beaming repeater is important with locks is that they are able to store a message from the hub and when the lock wakes up and says "anything for me to do", the beaming repeater can forward the lock or unlock message.
A beaming repeater is rather important with locks. They are hardwired, Z-Wave Plus (some non plus are capable) and very importantly, should be opposite the lock rather than beside. If the device is on the same wall as the lock, the radio signal will need to go through everything within the wall (2x4s plumbing heating etc.) to get to and from the low powered radios in the lock.